Segment and Geographic Information - Schedule of Geographic Distributions of Revenues, Equity in Earnings of Affiliates, Adjusted Segment EBITDA, Depreciation and Amortization and Assets (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Segment Reporting Information [Line Items]
Revenues	$ 15,591	$ 14,945
Equity in losses (earnings) of affiliates	18	(11)
Adjusted segment EBITDA	3,172	2,944
Depreciation and amortization	756	732
Interest expense	479	408
Losses (gains) on sales of facilities	15	(10)
Income before income taxes	1,922	1,814
Assets	52,711		$ 52,438
National Group [Member]
Segment Reporting Information [Line Items]
Revenues	4,616	4,202
Equity in losses (earnings) of affiliates	(1)	0
Adjusted segment EBITDA	1,149	955
Depreciation and amortization	207	197
Assets	12,058		11,793
Atlantic Group [Member]
Segment Reporting Information [Line Items]
Revenues	5,109	4,686
Equity in losses (earnings) of affiliates	(1)	0
Adjusted segment EBITDA	1,086	850
Depreciation and amortization	239	222
Assets	15,383		15,092
American Group [Member]
Segment Reporting Information [Line Items]
Revenues	5,199	5,206
Equity in losses (earnings) of affiliates	(12)	(9)
Adjusted segment EBITDA	1,133	1,316
Depreciation and amortization	237	232
Assets	17,742		17,934
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Revenues	667	851
Equity in losses (earnings) of affiliates	(32)	(2)
Adjusted segment EBITDA	(196)	(177)
Depreciation and amortization	73	$ 81
Assets	$ 7,528		$ 7,619