Fair Value Measurements - Changes in balances of Level 3 financial liabilities carried at fair value (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Financial liabilities, Beginning Balance	$ (2)	$ (2)
Total realized/unrealized gains (losses) included in Net income	0	0
Total realized/unrealized gains (losses) included in other comprehensive income (loss)	0	0
Purchases and issuances	0	0
Sales and settlements	1	0
Transfer into Level 3	0	0
Transfer out of Level 3	0	0
Financial liabilities, Ending Balance	(1)	(2)
Contingent consideration — acquisitions
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Financial liabilities, Beginning Balance	(2)	(2)
Total realized/unrealized gains (losses) included in Net income	0	0
Total realized/unrealized gains (losses) included in other comprehensive income (loss)	0	0
Purchases and issuances	0	0
Sales and settlements	1	0
Transfer into Level 3	0	0
Transfer out of Level 3	0	0
Financial liabilities, Ending Balance	$ (1)	$ (2)