Business Combinations - Additions, Payments, and Net Changes, as well as Interest Expense Accretion on Estimated Acquisition Earn-Out Payables (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Business Combinations [Abstract]
Beginning balance	$ 249	$ 252	$ 291
Additions to estimated acquisition earn-out payables from new acquisitions	73	67	73
Assumed estimated acquisition earn-out payables	3	21	35
Payments for estimated acquisition earn-out payables	(154)	(119)	(106)
Subtotal	171	221	293
Net change in earnings from estimated acquisition earn-out payables:
Change in fair value on estimated acquisition earn-out payables	(6)	14	(46)
Interest expense accretion	8	7	7
Net change in earnings from estimated acquisition earn-out payables	2	21	(39)
Foreign currency translation adjustments during the year	(6)	7	(2)
Ending balance	$ 167	$ 249	$ 252