Capitalization (Details)					1 Months Ended		3 Months Ended
	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 ($) shares	Mar. 31, 2022 USD ($) $ / shares shares	Mar. 31, 2021 USD ($)	Dec. 31, 2021 $ / shares shares	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
Issuance of common stock from forward equity sale agreement		$ 299,739,000
Issuance of common stock from forward equity sale agreement , shares | shares		6,700,000
Stock Purchase Contracts | shares							7,603,234
Repayments of long-term debt							$ 67,023,000	$ 46,305,000
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
Subsequent Event [Member]
Debt Instrument [Line Items]
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
Conversion to shares | $ / shares	$ 1.18758
Long-Term Debts [Member]
Debt Instrument [Line Items]
Face Amount			$ 400,000,000
Debt issuance expense			$ 4,010,000
Interest Rate			2.40%
Aqua Ohio, Inc [Member] | Mortgage Bonds [Member]
Debt Instrument [Line Items]
Face Amount										$ 100,000,000
Aqua Ohio, Inc [Member] | Mortgage Bonds Due 2031 [Member]
Debt Instrument [Line Items]
Face Amount										$ 50,000,000
Interest Rate										2.37%
Aqua Ohio, Inc [Member] | Mortgage Bonds Due 2051 [Member]
Debt Instrument [Line Items]
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
LDC Funding LLC [Member]
Debt Instrument [Line Items]
Private placement, per share | $ / shares				$ 50.00
Proceeds from tangible equity units				$ 690,000,000
Initial principal amount				$ 119,081,000
Initial principal amount per share | $ / shares				$ 8.62909
Cash installment | $ / shares				$ 0.75000
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