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		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Business Combinations [Abstract]
Beginning balance	$ 151	$ 169	$ 167	$ 249
Additions to estimated acquisition earn-out payables	8	8	24	28
Assumed acquisition earn-out payables	439	0	439	0
Payments for estimated acquisition earn-out payables	(32)	(38)	(78)	(135)
Subtotal	566	139	552	142
Net change in earnings from estimated acquisition earn-out payables:
Change in fair value on estimated acquisition earn-out payables	10	(9)	14	(15)
Interest expense accretion	1	1	4	6
Net change in earnings from estimated acquisition earn-out payables	11	(8)	18	(9)
Foreign currency translation adjustments during the year	(2)	6	5	4
Ending balance	$ 575	$ 137	$ 575	$ 137