Goodwill and Other Intangibles - Changes in Goodwill (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2024 USD ($)
Goodwill [Line Items]
Balance at January 1, 2024	$ 3,389
Acquisitions	379
Balance at September 30, 2024	3,768
East Group
Goodwill [Line Items]
Balance at January 1, 2024	764
Acquisitions	268
Balance at September 30, 2024	1,032
West Group
Goodwill [Line Items]
Balance at January 1, 2024	2,625
Acquisitions	111
Balance at September 30, 2024	$ 2,736