Supplemental Financial Information - Narrative (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Jun. 30, 2024	Sep. 30, 2025	Jun. 30, 2025	May 31, 2025	Mar. 31, 2025	Dec. 31, 2024	Sep. 30, 2024	Mar. 31, 2024	Dec. 31, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total equity	$ 4,741	$ 3,855	$ 4,741	$ 4,685		$ 4,374	$ 4,102	$ 4,193	$ 4,085	$ 4,089
Repurchase of Class A common stock (in shares)	2.8		2.8
Repurchase of Class A common stock	$ 81	$ 178	$ 81
Maximum
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stock repurchase program, authorized amount					$ 1,000
Accumulated foreign currency adjustment attributable to parent
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total equity	(239)		(239)				(309)
Accumulated defined benefit plans adjustment attributable to parent
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total equity	$ (88)		$ (88)				$ (95)