Goodwill and Other Intangibles - Changes in Goodwill (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2024 USD ($)
Goodwill [Line Items]
Balance at January 1, 2024	$ 3,389
Acquisitions	453
Balance at June 30, 2024	3,842
East Group
Goodwill [Line Items]
Balance at January 1, 2024	764
Acquisitions	345
Balance at June 30, 2024	1,109
West Group
Goodwill [Line Items]
Balance at January 1, 2024	2,625
Acquisitions	108
Balance at June 30, 2024	$ 2,733