Assets Held For Sale - Narrative (Details) - Disposal Group, Held-for-Sale, Not Discontinued Operations - Aquarion - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Jan. 27, 2025 |
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | |||||
| Proceeds from divestiture of business | $ 2,400.0 | ||||
| Disposal group, including discontinued operation, equity | 1,600.0 | ||||
| Disposal group, including discontinues operation, debt | $ 800.0 | ||||
| Disposal group, including discontinued operation, pre-tax income | $ 13.0 | $ 6.7 | $ 15.5 | $ 14.4 | |