|
Entity Common Stock, Shares Outstanding
|
DEI
|
|
Entity Number of Employees
|
DEI
|
|
Entity Public Float
|
DEI
|
|
Accounts Payable, Current
|
US-GAAP
|
|
Accounts Receivable, before Allowance for Credit Loss, Current
|
US-GAAP
|
|
Accounts Receivable, after Allowance for Credit Loss, Current
|
US-GAAP
|
|
Accrued Income Taxes, Current
|
US-GAAP
|
|
Accrued Liabilities, Current
|
US-GAAP
|
|
Accumulated Deferred Investment Tax Credit
|
US-GAAP
|
|
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment
|
US-GAAP
|
|
Accounts Receivable, Allowance for Credit Loss, Current
|
US-GAAP
|
|
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)
|
US-GAAP
|
|
Assets
|
US-GAAP
|
|
Assets, Current
|
US-GAAP
|
|
Assets, Noncurrent
|
US-GAAP
|
|
Assets, Noncurrent, Other than Noncurrent Investments and Property, Plant and Equipment
|
US-GAAP
|
|
Cash and Cash Equivalents, at Carrying Value
|
US-GAAP
|
|
Cash and Cash Equivalents, Period Increase (Decrease)
|
US-GAAP
|
|
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents
|
US-GAAP
|
|
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect
|
US-GAAP
|
|
Cash Surrender Value of Life Insurance
|
US-GAAP
|
|
Common Stock, Dividends, Per Share, Declared
|
US-GAAP
|
|
Common Stock, No Par Value
|
US-GAAP
|
|
Common Stock, Shares Authorized
|
US-GAAP
|
|
Common Stock, Shares, Issued
|
US-GAAP
|
|
Common Stock, Shares, Outstanding
|
US-GAAP
|
|
Common Stock, Value, Issued
|
US-GAAP
|
|
Construction in Progress Expenditures Incurred but Not yet Paid
|
US-GAAP
|
|
Contract with Customer, Asset, after Allowance for Credit Loss, Current
|
US-GAAP
|
|
Contract with Customer, Liability, Noncurrent
|
US-GAAP
|
|
Contributions in Aid of Construction
|
US-GAAP
|
|
Cost of Services, Environmental Remediation (Deprecated 2018-01-31)
|
US-GAAP
|
|
Current Federal Tax Expense (Benefit)
|
US-GAAP
|
|
Current State and Local Tax Expense (Benefit)
|
US-GAAP
|
|
Customer Advances for Construction
|
US-GAAP
|
|
Long-term Debt, Gross
|
US-GAAP
|
|
Debt Instrument, Unamortized Discount
|
US-GAAP
|
|
Deferred Compensation Arrangement with Individual, Compensation Expense
|
US-GAAP
|
|
Deferred Compensation Liability, Current and Noncurrent
|
US-GAAP
|
|
Deferred Federal Income Tax Expense (Benefit)
|
US-GAAP
|
|
Debt Issuance Costs, Noncurrent, Net
|
US-GAAP
|
|
Deferred Income Tax Expense (Benefit)
|
US-GAAP
|
|
Deferred Tax Liabilities, Gross
|
US-GAAP
|
|
Deferred Income Tax Liabilities, Net
|
US-GAAP
|
|
Deferred State and Local Income Tax Expense (Benefit)
|
US-GAAP
|
|
Deferred Tax Assets, Charitable Contribution Carryforwards
|
US-GAAP
|
|
Deferred Tax Assets, Gross
|
US-GAAP
|
|
Deferred Tax Assets, Net of Valuation Allowance, Current
|
US-GAAP
|
|
Deferred Tax Assets, Operating Loss Carryforwards
|
US-GAAP
|
|
Deferred Tax Assets, Other
|
US-GAAP
|
|
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Compensated Absences
|
US-GAAP
|
|
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation
|
US-GAAP
|
|
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Pensions
|
US-GAAP
|
|
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts
|
US-GAAP
|
|
Deferred Tax Assets, Valuation Allowance
|
US-GAAP
|
|
Deferred Tax Liabilities, Net
|
US-GAAP
|
|
Deferred Tax Liabilities, Deferred Expense, Debt Issuance Costs
|
US-GAAP
|
|
Deferred Tax Liabilities, Net, Noncurrent
|
US-GAAP
|
|
Deferred Tax Liabilities, Other
|
US-GAAP
|
|
Deferred Tax Liabilities, Property, Plant and Equipment
|
US-GAAP
|
|
Deferred Tax Liabilities, Regulatory Assets
|
US-GAAP
|
|
Defined Benefit Plan, Accumulated Benefit Obligation
|
US-GAAP
|
|
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)
|
US-GAAP
|
|
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)
|
US-GAAP
|
|
Defined Benefit Plan, Amortization of Gain (Loss)
|
US-GAAP
|
|
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)
|
US-GAAP
|
|
Assets for Plan Benefits, Defined Benefit Plan
|
US-GAAP
|
|
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate
|
US-GAAP
|
|
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase
|
US-GAAP
|
|
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate
|
US-GAAP
|
|
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets
|
US-GAAP
|
|
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase
|
US-GAAP
|
|
Defined Benefit Plan, Benefit Obligation
|
US-GAAP
|
|
Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)
|
US-GAAP
|
|
Defined Benefit Plan, Plan Assets, Contributions by Employer
|
US-GAAP
|
|
Defined Benefit Plan, Estimated Future Employer Contributions in Current Fiscal Year (Deprecated 2013-01-31)
|
US-GAAP
|
|
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year (Deprecated 2013-01-31)
|
US-GAAP
|
|
Defined Benefit Plan, Expected Contributions in Current Fiscal Year (Deprecated 2017-01-31)
|
US-GAAP
|
|
Defined Benefit Plan, Expected Future Benefit Payment, after Year Five for Next Five Years
|
US-GAAP
|
|
Defined Benefit Plan, Expected Future Benefit Payment, Year One
|
US-GAAP
|
|
Defined Benefit Plan, Expected Future Benefit Payment, Year Five
|
US-GAAP
|
|
Defined Benefit Plan, Expected Future Benefit Payment, Year Four
|
US-GAAP
|
|
Defined Benefit Plan, Expected Future Benefit Payment, Year Three
|
US-GAAP
|
|
Defined Benefit Plan, Expected Future Benefit Payment, Year Two
|
US-GAAP
|
|
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year
|
US-GAAP
|
|
Defined Benefit Plan, Expected Return (Loss) on Plan Assets
|
US-GAAP
|
|
Defined Benefit Plan, Plan Assets, Amount
|
US-GAAP
|
|
Defined Benefit Plan, Funded (Unfunded) Status of Plan
|
US-GAAP
|
|
Defined Benefit Plan, Interest Cost
|
US-GAAP
|
|
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)
|
US-GAAP
|
|
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment
|
US-GAAP
|
|
Defined Benefit Plan, Service Cost
|
US-GAAP
|
|
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year (Deprecated 2017-01-31)
|
US-GAAP
|
|
Defined Contribution Plan, Employer Discretionary Contribution Amount
|
US-GAAP
|
|
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay
|
US-GAAP
|
|
Defined Contribution Plan, Employer Matching Contribution, Percent of Match
|
US-GAAP
|
|
Defined Contribution Plan, Maximum Annual Contribution Per Employee, Amount (Deprecated 2013-01-31)
|
US-GAAP
|
|
Defined Contribution Plan, Maximum Annual Contribution Per Employee, Percent (Deprecated 2013-01-31)
|
US-GAAP
|
|
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent
|
US-GAAP
|
|
Depreciation, Depletion and Amortization
|
US-GAAP
|
|
Derivative Financial Instruments, Liabilities, Fair Value Disclosure (Deprecated 2013-01-31)
|
US-GAAP
|
|
Dividends, Common Stock
|
US-GAAP
|
|
Dividends Payable, Current
|
US-GAAP
|
|
Earnings Per Share, Basic
|
US-GAAP
|
|
Earnings Per Share, Diluted
|
US-GAAP
|
|
Effective Income Tax Rate Reconciliation, Percent
|
US-GAAP
|
|
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
|
US-GAAP
|
|
Employee-related Liabilities, Current
|
US-GAAP
|
|
Gain (Loss) on Disposition of Property Plant Equipment
|
US-GAAP
|
|
General and Administrative Expense
|
US-GAAP
|
|
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest
|
US-GAAP
|
|
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest
|
US-GAAP
|
|
Income Tax Examination, Penalties and Interest Expense
|
US-GAAP
|
|
Income Tax Expense (Benefit)
|
US-GAAP
|
|
Income Tax Expense (Benefit), Continuing Operations (Deprecated 2013-01-31)
|
US-GAAP
|
|
Income Taxes Paid
|
US-GAAP
|
|
Income Taxes Receivable, Current
|
US-GAAP
|
|
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount
|
US-GAAP
|
|
Effective Income Tax Rate Reconciliation, Deduction, Qualified Production Activity, Amount
|
US-GAAP
|
|
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount
|
US-GAAP
|
|
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Life Insurance, Amount
|
US-GAAP
|
|
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount
|
US-GAAP
|
|
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount
|
US-GAAP
|
|
Effective Income Tax Rate Reconciliation, Tax Credit, Investment, Amount
|
US-GAAP
|
|
Effective Income Tax Rate Reconciliation, Tax Exempt Income, Amount
|
US-GAAP
|
|
Increase (Decrease) in Accounts and Other Receivables
|
US-GAAP
|
|
Increase (Decrease) in Accounts Payable and Accrued Liabilities
|
US-GAAP
|
|
Increase (Decrease) in Income Taxes Receivable
|
US-GAAP
|
|
Increase (Decrease) in Notes Receivables
|
US-GAAP
|
|
Increase (Decrease) in Restricted Cash
|
US-GAAP
|
|
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements
|
US-GAAP
|
|
Interest Expense
|
US-GAAP
|
|
Interest Paid, Excluding Capitalized Interest, Operating Activities
|
US-GAAP
|
|
Interest Payable, Current
|
US-GAAP
|
|
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net
|
US-GAAP
|
|
Interest Rate Derivative Liabilities, at Fair Value
|
US-GAAP
|
|
Investment Tax Credit
|
US-GAAP
|
|
Liabilities and Equity
|
US-GAAP
|
|
Liabilities, Current
|
US-GAAP
|
|
Liabilities, Noncurrent
|
US-GAAP
|
|
Liabilities, Other than Long-term Debt, Noncurrent
|
US-GAAP
|
|
Liability for Uncertainty in Income Taxes, Current
|
US-GAAP
|
|
Line of Credit Facility, Average Outstanding Amount
|
US-GAAP
|
|
Line of Credit Facility, Interest Rate at Period End
|
US-GAAP
|
|
Line of Credit Facility, Interest Rate During Period
|
US-GAAP
|
|
Line of Credit Facility, Maximum Borrowing Capacity
|
US-GAAP
|
|
Long-term Debt, Current Maturities
|
US-GAAP
|
|
Long-Term Debt, Maturity, Year One
|
US-GAAP
|
|
Long-Term Debt, Maturity, Year Five
|
US-GAAP
|
|
Long-Term Debt, Maturity, Year Four
|
US-GAAP
|
|
Long-Term Debt, Maturity, Year Three
|
US-GAAP
|
|
Long-Term Debt, Maturity, Year Two
|
US-GAAP
|
|
Long-term Debt, Excluding Current Maturities
|
US-GAAP
|
|
Net Cash Provided by (Used in) Financing Activities
|
US-GAAP
|
|
Net Cash Provided by (Used in) Financing Activities, Continuing Operations
|
US-GAAP
|
|
Net Cash Provided by (Used in) Investing Activities
|
US-GAAP
|
|
Net Cash Provided by (Used in) Investing Activities, Continuing Operations
|
US-GAAP
|
|
Net Cash Provided by (Used in) Operating Activities
|
US-GAAP
|
|
Net Cash Provided by (Used in) Operating Activities, Continuing Operations
|
US-GAAP
|
|
Net Income (Loss) Attributable to Parent
|
US-GAAP
|
|
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component
|
US-GAAP
|
|
Nonoperating Income (Expense)
|
US-GAAP
|
|
Financing Receivable, after Allowance for Credit Loss, Noncurrent
|
US-GAAP
|
|
Operating Income (Loss)
|
US-GAAP
|
|
Operating Lease, Lease Income
|
US-GAAP
|
|
Operating Leases, Income Statement, Lease Revenue
|
US-GAAP
|
|
Other Assets, Noncurrent
|
US-GAAP
|
|
Other Labor-related Expenses
|
US-GAAP
|
|
Other Liabilities, Noncurrent
|
US-GAAP
|
|
Other Noncash Income (Expense)
|
US-GAAP
|
|
Other Nonoperating Income (Expense)
|
US-GAAP
|
|
Other Postretirement Benefits Cost (Reversal of Cost)
|
US-GAAP
|
|
Liability, Other Postretirement Defined Benefit Plan, Noncurrent
|
US-GAAP
|
|
Other Receivables, Gross, Current
|
US-GAAP
|
|
Payments for Repurchase of Common Stock
|
US-GAAP
|
|
Payments of Debt Issuance Costs
|
US-GAAP
|
|
Payments of Ordinary Dividends, Common Stock
|
US-GAAP
|
|
Payments to Acquire Other Property, Plant, and Equipment
|
US-GAAP
|
|
Payments to Acquire Property, Plant, and Equipment
|
US-GAAP
|
|
Payments to Acquire Waste Water Systems
|
US-GAAP
|
|
Payments to Acquire Water and Waste Water Systems
|
US-GAAP
|
|
Payments to Acquire Water Systems
|
US-GAAP
|
|
Liability, Pension and Other Postretirement and Postemployment Benefits, Noncurrent
|
US-GAAP
|
|
Preferred Stock, Shares Authorized
|
US-GAAP
|
|
Preferred Stock, Shares Issued
|
US-GAAP
|
|
Preferred Stock, Value, Issued
|
US-GAAP
|
|
Prepaid Expense, Current
|
US-GAAP
|
|
Proceeds from Advances for Construction
|
US-GAAP
|
|
Proceeds from Issuance of Common Stock
|
US-GAAP
|
|
Proceeds from Issuance of Long-term Debt
|
US-GAAP
|
|
Proceeds from Life Insurance Policy
|
US-GAAP
|
|
Proceeds from Lines of Credit
|
US-GAAP
|
|
Proceeds from (Repayments of) Bank Overdrafts
|
US-GAAP
|
|
Proceeds from (Repayments of) Lines of Credit
|
US-GAAP
|
|
Proceeds from Sale of Property, Plant, and Equipment
|
US-GAAP
|
|
Property, Plant and Equipment, Net
|
US-GAAP
|
|
Public Utilities, Allowance for Funds Used During Construction, Additions
|
US-GAAP
|
|
Allowance for Funds Used During Construction, Capitalized Interest
|
US-GAAP
|
|
Public Utilities, Allowance for Funds Used During Construction, Rate
|
US-GAAP
|
|
Public Utilities, Inventory
|
US-GAAP
|
|
Public Utilities, Property, Plant and Equipment, Accumulated Depreciation
|
US-GAAP
|
|
Public Utilities, Property, Plant and Equipment, Amount of Acquisition Adjustments (Deprecated 2012-01-31)
|
US-GAAP
|
|
Public Utilities, Property, Plant and Equipment, Amount of Acquisition Adjustments
|
US-GAAP
|
|
Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service
|
US-GAAP
|
|
Public Utilities, Property, Plant and Equipment, Net
|
US-GAAP
|
|
Public Utilities, Property, Plant and Equipment, Plant in Service
|
US-GAAP
|
|
Real Estate Tax Expense
|
US-GAAP
|
|
Receivables, Net, Current
|
US-GAAP
|
|
Regulated Operating Revenue
|
US-GAAP
|
|
Regulated Operating Revenue, Other
|
US-GAAP
|
|
Regulated Operating Revenue, Water
|
US-GAAP
|
|
Regulatory Assets
|
US-GAAP
|
|
Regulatory Assets, Noncurrent
|
US-GAAP
|
|
Regulatory Liabilities
|
US-GAAP
|
|
Regulatory Liability, Current
|
US-GAAP
|
|
Regulatory Liability, Noncurrent
|
US-GAAP
|
|
Repayments of Advances for Construction
|
US-GAAP
|
|
Repayments of Lines of Credit
|
US-GAAP
|
|
Repayments of Long-term Debt
|
US-GAAP
|
|
Restricted Cash
|
US-GAAP
|
|
Restricted Cash and Cash Equivalents, Current
|
US-GAAP
|
|
Restricted Cash and Cash Equivalents, Noncurrent
|
US-GAAP
|
|
Restricted Stock or Unit Expense
|
US-GAAP
|
|
Retained Earnings (Accumulated Deficit)
|
US-GAAP
|
|
Revenue from Contract with Customer, Excluding Assessed Tax
|
US-GAAP
|
|
Revenues
|
US-GAAP
|
|
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period
|
US-GAAP
|
|
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period
|
US-GAAP
|
|
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period
|
US-GAAP
|
|
Short-term Debt
|
US-GAAP
|
|
Stockholders' Equity Attributable to Parent
|
US-GAAP
|
|
Stock Issued During Period, Value, New Issues
|
US-GAAP
|
|
Stock Issued During Period, Value, Restricted Stock Award, Gross
|
US-GAAP
|
|
Stock Repurchased and Retired During Period, Shares
|
US-GAAP
|
|
Stock Repurchased and Retired During Period, Value
|
US-GAAP
|
|
Stock Repurchase Program, Number of Shares Authorized to be Repurchased
|
US-GAAP
|
|
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased
|
US-GAAP
|
|
Taxes, Other
|
US-GAAP
|
|
Time Sharing Transactions, Stated Interest Rates for Notes Receivable, Maximum (Deprecated 2016-01-31)
|
US-GAAP
|
|
Time Sharing Transactions, Stated Interest Rates for Notes Receivable, Minimum (Deprecated 2016-01-31)
|
US-GAAP
|
|
Time-sharing Transactions, Stated Interest Rate for Notes Receivable
|
US-GAAP
|
|
Treasury Stock, Common, Shares
|
US-GAAP
|
|
Treasury Stock, Common, Value
|
US-GAAP
|
|
Treasury Stock, Shares, Acquired
|
US-GAAP
|
|
Treasury Stock, Value, Acquired, Cost Method
|
US-GAAP
|
|
Unamortized Debt Issuance Expense
|
US-GAAP
|
|
Unbilled Receivables, Current
|
US-GAAP
|
|
Utilities Operating Expense
|
US-GAAP
|
|
Utilities Operating Expense, Depreciation and Amortization
|
US-GAAP
|
|
Utilities Operating Expense, Maintenance and Operations
|
US-GAAP
|
|
Utilities Operating Expense, Taxes
|
US-GAAP
|
|
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount
|
US-GAAP
|
|
SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Cost and Expense
|
US-GAAP
|
|
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction
|
US-GAAP
|
|
SEC Schedule, 12-09, Valuation Allowances and Reserves, Addition, Recovery
|
US-GAAP
|
|
Weighted Average Number Diluted Shares Outstanding Adjustment
|
US-GAAP
|
|
Weighted Average Number of Shares Outstanding, Diluted
|
US-GAAP
|
|
Weighted Average Number of Shares Outstanding, Basic
|
US-GAAP
|
|
Sale of Stock, Consideration Received on Transaction
|
US-GAAP
|
|
Shares Issued, Price Per Share
|
US-GAAP
|
|
Stock Issued During Period, Shares, New Issues
|
US-GAAP
|
|
Interest Expense, Debt
|
US-GAAP
|
|
Stock Repurchase Program Number Of Shares Authorized To Be Repurchased
|
SRT
|