Restructuring Costs - Rollforward of Liability Associated with Cash-based Charges (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Restructuring Cost and Reserve [Line Items]
Charges incurred		$ 68	$ 99	$ 26
Transformation Program [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	$ 0	6	1
Charges incurred	2	30	28
Cash payments	(1)	(25)	(23)
Ending Balance	1	11	6	1
Transformation Program [Member] | Real Estate Rationalization [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance		6
Charges incurred		22	27
Cash payments		(25)	(21)
Ending Balance		3	6
Transformation Program [Member] | Technology Modernization [Member]
Restructuring Cost and Reserve [Line Items]
Charges incurred		8
Ending Balance		8
Transformation Program [Member] | Process Optimization [Member]
Restructuring Cost and Reserve [Line Items]
Charges incurred			1
Cash payments			(1)
Transformation Program [Member] | Other [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	0		1
Charges incurred	2
Cash payments	(1)		$ (1)
Ending Balance	$ 1	$ 0		$ 1