Investments in Unconsolidated Affiliates (Investments in Equity Method Unconsolidated Affiliates) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Investments In Unconsolidated Affiliates [Line Items]
Investments	$ 492	$ 455
Equity in earnings of unconsolidated affiliates	113	113	$ 62
Electric Utilities and Infrastructure
Investments In Unconsolidated Affiliates [Line Items]
Investments	97	99
Equity in earnings of unconsolidated affiliates	7	7	7
Gas Utilities and Infrastructure
Investments In Unconsolidated Affiliates [Line Items]
Investments	259	240
Equity in earnings of unconsolidated affiliates	40	21	8
Other
Investments In Unconsolidated Affiliates [Line Items]
Investments	136	116
Equity in earnings of unconsolidated affiliates	$ 66	$ 85	$ 47