Restructuring, Repositioning, and Efficiency (Details) - 2019 Business Optimization - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]
Total restructuring, repositioning, and efficiency charges	$ 0	$ 0	$ 40,000,000
Personnel expense
Restructuring Cost and Reserve [Line Items]
Total restructuring, repositioning, and efficiency charges			11,000,000
Legal and professional fees
Restructuring Cost and Reserve [Line Items]
Total restructuring, repositioning, and efficiency charges			16,000,000
Net occupancy expense
Restructuring Cost and Reserve [Line Items]
Total restructuring, repositioning, and efficiency charges			1,000,000
Other
Restructuring Cost and Reserve [Line Items]
Total restructuring, repositioning, and efficiency charges			$ 12,000,000