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, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Business Combinations [Abstract]
Beginning balance	$ 143	$ 203	$ 167	$ 249
Additions to estimated acquisition earn-out payables	12	10	17	19
Payments for estimated acquisition earn-out payables	(20)	(45)	(46)	(96)
Subtotal	135	168	138	172
Net change in earnings from estimated acquisition earn-out payables:
Change in fair value on estimated acquisition earn-out payables	9	(2)	4	(7)
Interest expense accretion	2	3	3	5
Net change in earnings from estimated acquisition earn-out payables	11	1	7	(2)
Foreign currency translation adjustments during the year	5	0	6	(1)
Ending balance	$ 151	$ 169	$ 151	$ 169