Income Taxes - Effective Income Tax Rate and Amount Reconciliation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Amount
Income tax benefit at U.S. statutory rate	$ 72	$ 119	$ 193
State and local income taxes, net of federal benefit	13	32	(26)
Changes in Valuation allowance	(8)	(68)	(1)
Non-controlling interest	13	8	23
Income not subject to taxation	(75)	(91)	(239)
Non-deductible executive compensation	(3)
Credits and incentives		19	26
Uncertain tax positions		5	17
Deconsolidation			23
Tax gain not on books			(83)
Dividends received	2
Dividends received		(4)	(20)
Other	2	5	(3)
Income tax benefit (expense)	$ 19	$ 25	$ (90)
Tax Jurisdiction of Domicile [Extensible Enumeration]	United States	United States	United States
Effective Income Tax Rate Reconciliation, State and Local Jurisdiction, Contribution Greater than 50 Percent, Tax Effect [Extensible Enumeration]	Kansas, stpr:OK, TENNESSEE
Percent
Statutory federal income tax rate	21.00%
State and local income taxes, net of federal benefit	3.60%
Changes in Valuation allowance	(2.26%)
Non-controlling interest	3.81%
Income not subject to taxation	(21.81%)
Non-deductible executive compensation	(0.83%)
Dividends received	0.52%
Other	0.39%
Income tax benefit (expense)	5.31%
ARUBA
Amount
Changes in Valuation allowance	$ 5
Percent
Changes in Valuation allowance	1.51%
Other	0.00%
Other foreign jurisdiction
Amount
Other	$ (2)
Percent
Other	(0.62%)