Segment Information - Reconciliation (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Segment Reporting Information [Line Items]
Total adjusted EBITDA	$ 1,764	$ 2,089	$ 3,678	$ 4,246
Depreciation and amortization	(827)	(1,041)	(1,635)	(2,191)
OPERATING INCOME	912	1,006	1,995	1,993
Total other expense, net	(459)	(332)	(741)	(687)
INCOME BEFORE INCOME TAXES	453	674	1,254	1,306
Income tax expense	109	168	311	325
NET INCOME	344	506	943	981
Operating Segments
Segment Reporting Information [Line Items]
Total adjusted EBITDA	3,313	3,573	6,710	7,237
Segment Reconciling Items
Segment Reporting Information [Line Items]
Total adjusted EBITDA	(1,549)	(1,484)	(3,032)	(2,991)
Operations and other expenses	(1,549)	(1,484)	(3,032)	(2,991)
Depreciation and amortization	(827)	(1,041)	(1,635)	(2,191)
Stock-based compensation	(25)	(42)	(48)	(62)
OPERATING INCOME	912	1,006	1,995	1,993
Total other expense, net	$ (459)	$ (332)	$ (741)	$ (687)