Income Taxes - Effective Tax Rate Reconciliation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Amount
Statutory federal income tax rate	$ (205)
Other effect of cross-border tax laws	(1)
Other tax credits	0
Changes in valuation allowance	0
Goodwill impairment	421		$ 505
Loss on disposal group held for sale (Note 3)	50
Other nontaxable or nondeductible items	(1)
State income taxes, net of federal income tax benefit	47
Change in liability for unrecognized tax position	25
Income tax expense	$ 352	$ 527	$ 561
Effective income tax rate:
Federal statutory income tax rate	21.00%	21.00%	21.00%
Other effect of cross-border tax laws	0.10%
Other tax credits (as a percent)	0.00%
Changes in valuation allowance (as a percent)	0.00%
Goodwill impairment	(43.20%)	0.00%	(187.20%)
Loss on disposal group held for sale (Note 3)	(5.10%)
Other nontaxable or nondeductible items	0.10%
State income taxes, net of federal income tax benefit	(4.80%)	3.70%	(31.30%)
Change in liability for unrecognized tax position	(2.60%)	1.50%	(8.90%)
Other		0.00%	(1.40%)
Effective income tax rate	(36.10%)	26.20%	(207.80%)
India
Amount
Deferred tax on unremitted earnings	$ 13
Other foreign tax effect	$ 3
Effective income tax rate:
Deferred tax on unremitted earnings	(1.30%)
Other foreign tax effect	(0.30%)