Income Taxes - Deferred Tax Assets (Liabilities) (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Deferred tax liabilities:
Property, plant and equipment	$ (1,414,000,000)	$ (1,386,000,000)
Intangible assets	(114,000,000)	(129,000,000)
Other	(54,000,000)	(25,000,000)
Total deferred tax liabilities	(1,582,000,000)	(1,540,000,000)
Deferred tax assets:
Payable to affiliate due to post-retirement benefit plan participation	302,000,000	274,000,000
Gross deferred tax assets	302,000,000	274,000,000
Less valuation allowance on deferred tax assets	0	(8,000,000)
Net deferred tax assets	302,000,000	266,000,000
Net deferred tax liabilities	$ (1,280,000,000)	$ (1,274,000,000)