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
	Mar. 31, 2025	Mar. 31, 2024
Business Combinations [Abstract]
Beginning balance	$ 167	$ 249
Additions to estimated acquisition earn-out payables	5	9
Payments for estimated acquisition earn-out payables	(26)	(52)
Subtotal	146	206
Net change in earnings from estimated acquisition earn-out payables:
Change in fair value on estimated acquisition earn-out payables	(6)	(4)
Interest expense accretion	2	2
Net change in earnings from estimated acquisition earn-out payables	(4)	(2)
Foreign currency translation adjustments during the year	1	(1)
Ending balance	$ 143	$ 203