Summary of Accounting Policies (Variable Interest Entities) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Schedule of Investments [Line Items]
Total assets	$ 22,857	$ 26,597
Property, plant and equipment (net of accumulated depreciation - 2024: $4,562; 2023: $4,080)	$ 5,273	5,584
Variable Interest Entity, Primary Beneficiary
Schedule of Investments [Line Items]
Ownership percentage	50.00%
Total assets	$ 574	626
Property, plant and equipment (net of accumulated depreciation - 2024: $4,562; 2023: $4,080)	491	529
Variable Interest Entity, Not Primary Beneficiary
Schedule of Investments [Line Items]
Maximum exposure to loss	$ 208	$ 208