Restructuring - Additional Information (Detail) - USD ($) $ in Millions			9 Months Ended	24 Months Ended
	Dec. 22, 2020	Jul. 29, 2020	Sep. 30, 2021	Dec. 31, 2022	Dec. 31, 2020
2020 Real Estate Rationalization Restructuring Program | Estimated Annual Savings | Minimum
Restructuring Cost and Reserve [Line Items]
Effect on future earnings, amount		$ 5
2020 Real Estate Rationalization Restructuring Program | Estimated Annual Savings | Maximum
Restructuring Cost and Reserve [Line Items]
Effect on future earnings, amount		$ 6
2020 MA Strategic Reorganization Restructuring Program | Estimated Annual Savings
Restructuring Cost and Reserve [Line Items]
Effect on future earnings, amount	$ 20
2020 MA Strategic Reorganization Restructuring Program | Forecast
Restructuring Cost and Reserve [Line Items]
Payments for restructuring				$ 20
Employee Severance
Restructuring Cost and Reserve [Line Items]
Remaining restructuring liability			$ 8		$ 18
Employee Severance | 2020 Real Estate Rationalization Restructuring Program
Restructuring Cost and Reserve [Line Items]
Cost incurred to date			36
Employee Severance | 2020 MA Strategic Reorganization Restructuring Program
Restructuring Cost and Reserve [Line Items]
Cost incurred to date			20
Payments for restructuring			$ 12