Segment and Related Information - Goodwill (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Goodwill, Beginning Balance	$ 9,028	$ 8,994
Acquired goodwill	325	76
Divested goodwill		(47)
Foreign currency translation and other	(30)	5
Goodwill, Ending Balance	9,323	9,028
Goodwill post-closing adjustment increase (decrease)		(26)
East Tier [Member]
Segment Reporting Information [Line Items]
Goodwill, Beginning Balance	5,120	5,101
Acquired goodwill	92	27
Divested goodwill		(11)
Foreign currency translation and other	(30)	3
Goodwill, Ending Balance	5,182	5,120
West Tier [Member]
Segment Reporting Information [Line Items]
Goodwill, Beginning Balance	3,833	3,823
Acquired goodwill	24	15
Divested goodwill		(7)
Foreign currency translation and other		2
Goodwill, Ending Balance	3,857	3,833
Other [Member]
Segment Reporting Information [Line Items]
Goodwill, Beginning Balance	75	70
Acquired goodwill	209	34
Divested goodwill		(29)
Foreign currency translation and other
Goodwill, Ending Balance	$ 284	$ 75