Income Taxes, Reconciliation of the Benefit From (Provision For) Income Taxes (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reconciliation of the benefit from (provision for) income taxes [Abstract]
Pre-Tax Net Book Income ("NBI")		$ 5,697	$ 4,825	$ 3,762
Texas Margin Tax	[1]	(56)	(42)	(32)
State income tax benefit (provision), net of federal benefit	[2]	(1)	(1)	9
Federal income tax benefit (provision) computed by applying the federal statutory rate to NBI of corporate entities		(15)	(13)	80
Federal benefit attributable to settlement of Liquidity Option Agreement	[2]	0	0	68
Valuation allowance	[3]	(8)	(14)	0
Other		(2)	0	(1)
Total benefit from (provision for) income taxes		$ (82)	$ (70)	$ 124
Effective income tax rate		(1.40%)	(1.50%)	3.30%

[1] Although the Texas Margin Tax is not considered a state income tax, it has the characteristics of an income tax since it is determined by applying a tax rate to a base that considers our Texas-sourced revenues and expenses.

[2] The total benefit recognized in income tax expense on March 5, 2020 from settlement of the Liquidity Option was $72 million, which is comprised of $4 million of state income tax benefit and $68 million of federal income tax benefit.

[3] Management believes that it is more likely than not that the net deferred tax assets attributable to OTA will not be fully realizable.  Accordingly, we provided for a valuation allowance against OTA’s net deferred tax assets.