Segment Information - Reconciliation of Adjusted EBITDA from Segment to Consolidated Statements (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting [Abstract]
Adjusted EBITDA	$ 10,244	$ 9,827	$ 19,659	$ 18,977
Adjustments	3	9	11	(24)
Depreciation	(2,195)	(2,162)	(4,459)	(4,375)
Amortization	(1,343)	(1,306)	(2,856)	(2,641)
Interest expense	(998)	(968)	(2,007)	(1,962)
Investment and other income (loss), net	15	(897)	622	(709)
Income before income taxes	$ 5,726	$ 4,502	$ 10,970	$ 9,266