Fair Value Measurements - Fair Values and Related Carrying Values of Financial Instruments (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes receivable, net, carrying amount	$ 21	$ 21
Notes receivable, net, fair value	21	21
Debt, excluding capital lease obligations, carrying amount	(46,962)	(53,848)
Debt, excluding capital lease obligations, fair value	(46,292)	(53,769)
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes receivable, net, fair value	13	13
Debt, excluding capital lease obligations, fair value	(46,292)	(53,769)
Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes receivable, net, fair value	$ 8	$ 8