Segment and Geographic Information - Schedule of Geographic Distributions of Revenues, Equity in Earnings or Losses of Affiliates, Adjusted Segment EBITDA, Depreciation and Amortization (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information [Line Items]
Revenues	$ 17,339	$ 15,591
Equity in (earnings) losses of affiliates	2	18
Adjusted segment EBITDA	3,353	3,172
Depreciation and amortization	795	756
Interest expense	512	479
Losses (gains) on sales of facilities	(201)	15
Income before income taxes	2,247	1,922
National Group [Member]
Segment Reporting Information [Line Items]
Revenues	4,795	4,616
Equity in (earnings) losses of affiliates	(1)	(1)
Adjusted segment EBITDA	1,068	1,149
Depreciation and amortization	212	207
Atlantic Group [Member]
Segment Reporting Information [Line Items]
Revenues	5,677	5,109
Equity in (earnings) losses of affiliates	(1)	(1)
Adjusted segment EBITDA	1,289	1,086
Depreciation and amortization	258	239
American Group [Member]
Segment Reporting Information [Line Items]
Revenues	5,914	5,199
Equity in (earnings) losses of affiliates	(13)	(12)
Adjusted segment EBITDA	1,320	1,133
Depreciation and amortization	255	237
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Revenues	953	667
Equity in (earnings) losses of affiliates	17	32
Adjusted segment EBITDA	(324)	(196)
Depreciation and amortization	$ 70	$ 73