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The forward price on the price risk forward or futures contract, such as a gas futures contract.

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Number of shares of stock issued during the period as part of a transaction to acquire assets that do not qualify as a business combination.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of uncollateralized debt obligations (with maturities initially due after one year or beyond the operating cycle if longer).

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Capitalization (Details)								1 Months Ended		3 Months Ended		9 Months Ended		12 Months Ended
Capitalization (Details)	Oct. 14, 2022 USD ($)	Jun. 30, 2022 USD ($)	May 20, 2022 USD ($)	May 02, 2022 $ / shares shares	Aug. 09, 2021 USD ($) $ / agreement shares	Apr. 19, 2021 USD ($)	Apr. 23, 2019 USD ($) $ / shares	Apr. 30, 2022 shares	Aug. 31, 2020 USD ($) shares	Jun. 30, 2022 USD ($) shares	Sep. 30, 2021 USD ($) shares	Sep. 30, 2022 USD ($) $ / shares shares	Sep. 30, 2021 USD ($)	Dec. 31, 2021 $ / shares shares	Oct. 31, 2022 USD ($)	Jun. 29, 2022 USD ($)	Apr. 15, 2021 USD ($)
Debt Instrument [Line Items]
Common stock, par value \| $ / shares												$ 0.50		$ 0.50
Common stock, shares authorized \| shares												600,000,000		600,000,000
Common stock, shares issued \| shares												265,530,007		256,102,388
Issuance of common stock from forward equity sale agreement	$ 500,000,000				$ 299,739,000						$ 299,739,000
Issuance of common stock from forward equity sale agreement , shares \| shares					6,700,000						6,700,000
Stock purchase contracts early settled by holders of the contracts \| shares								981,919
Shares settled \| shares				6,621,315				1,166,107
Issuance of common stock from stock purchase contracts , shares \| shares				7,863,354						9,029,461	127,749
Conversion to shares \| $ / shares				$ 1.18758
Repayments of long-term debt												$ 521,792,000	$ 717,816,000
Initial Forward Equity Sale Agreement [Member]
Debt Instrument [Line Items]
Forward price \| $ / agreement					46.00
Forward Equity Sale Agreement [Member]
Debt Instrument [Line Items]
Proceeds from private placement									$ 0
Common stock, shares authorized \| shares									6,700,000
Forward price \| $ / agreement					44.74
Unsecured Credit Facility [Member]
Debt Instrument [Line Items]
Repayment of line of credit			$ 410,000,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Maturity		Jun. 29, 2023
Borrowing capacity		$ 300,000,000								$ 300,000,000						$ 100,000,000
Debt term			5 years
Notes at 5.30%, due 2052
Debt Instrument [Line Items]
Debt instrument, interest rate			5.30%									5.30%		5.30%
Maturity date												2052		2052
Debt issuance expense			$ 5,815,000
Maturity Year			2052
Interest Rate			5.30%									5.30%		5.30%
Unsecured notes payable			$ 500,000,000									$ 500,000,000
Long-Term Debts [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate						2.40%
Face Amount						$ 400,000,000
Debt issuance expense						$ 4,010,000
Interest Rate						2.40%
Aqua Ohio, Inc [Member] \| First Mortgage Bonds [Member]
Debt Instrument [Line Items]
Face Amount																	$ 100,000,000
Aqua Ohio, Inc [Member] \| First Mortgage Bonds Due In 2031 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate																	2.37%
Face Amount																	$ 50,000,000
Interest Rate																	2.37%
Aqua Ohio, Inc [Member] \| First Mortgage Bonds Due In 2051 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate																	3.35%
Face Amount																	$ 50,000,000
Interest Rate																	3.35%
Aqua Pennsylvania, Inc [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt term						5 years
Repayments of long-term debt						$ 50,000,000
Repayment of line of credit			$ 49,700,000
Aqua Pennsylvania, Inc [Member] \| First Mortgage Bonds Due In 2052 [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate															4.50%
Face Amount															$ 125,000,000
Interest Rate															4.50%
LDC Funding LLC [Member]
Debt Instrument [Line Items]
Private placement, per share \| $ / shares							$ 50.00
Proceeds from tangible equity units							$ 690,000,000
Debt instrument, interest rate							3.00%
Initial principal amount							$ 119,081,000
Initial principal amount per share \| $ / shares							$ 8.62909
Cash installment \| $ / shares							$ 0.75
Cash installment rate							6.00%
Debt issuance expense							$ 16,358,000
Interest Rate							3.00%
LDC Funding LLC [Member] \| July 30, 2019 [Member]
Debt Instrument [Line Items]
Cash installment \| $ / shares							$ 0.80833