Business Combinations - Additions, Payments, and Net Changes, as well as Interest Expense Accretion on Estimated Acquisition Earn-Out Payables (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Business Combinations [Abstract]
Beginning balance	$ 203	$ 254	$ 249	$ 252
Additions to estimated acquisition earn-out payables	10	21	19	40
Payments for estimated acquisition earn-out payables	(45)	(47)	(96)	(64)
Subtotal	168	228	172	228
Net change in earnings from estimated acquisition earn-out payables:
Change in fair value on estimated acquisition earn-out payables	(2)	0	(7)	(4)
Interest expense accretion	3	2	5	4
Net change in earnings from estimated acquisition earn-out payables	1	2	(2)	0
Foreign currency translation adjustments during the year	0	2	(1)	4
Ending balance	$ 169	$ 232	$ 169	$ 232