Restructuring and Other Charges, Net - Activity and Reserve Balances for Restructuring Charges (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2025	Dec. 31, 2024
Restructuring Cost and Reserve [Line Items]
Restructuring reserve beginning balance	$ 181	$ 63
Restructuring and other charges, net	5	308
Cash payments	(49)	(183)
Reversals and other	3	(7)
Restructuring reserve ending balance	140	181
Severance and Employee Termination Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve beginning balance	13	6
Restructuring and other charges, net	0	44
Cash payments	(1)	(38)
Reversals and other	(1)	1
Restructuring reserve ending balance	11	13
Other Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve beginning balance	168	57
Restructuring and other charges, net	5	264
Cash payments	(48)	(145)
Reversals and other	4	(8)
Restructuring reserve ending balance	$ 129	$ 168