Stockholders' Equity (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended	15 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025	Mar. 31, 2026
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance	$ 7,775	$ 7,592	$ 7,592	$ 7,592
Foreign currency translation adjustment—net of taxes	(22)	11
Balance	8,256	7,297	7,775	8,256
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance	(235)	(280)	(280)	(280)
Balance	(256)	(271)	(235)	(256)
Foreign Currency Translation Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance	(151)	(221)	(221)	(221)
Foreign currency translation adjustment—net of taxes	(22)	11
Balance	(173)	(210)	(151)	(173)
Unrealized Gain on Derivatives
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance	3	3	3	3
Foreign currency translation adjustment—net of taxes	(1)	0
Balance	2	3	3	2
Defined Benefit Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance	(87)	(62)	(62)	(62)
Foreign currency translation adjustment—net of taxes	2	(2)
Balance	(85)	(64)	(87)	(85)
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance	(235)	(280)	(280)	(280)
Foreign currency translation adjustment—net of taxes	(21)	9
Balance	$ (256)	$ (271)	$ (235)	$ (256)