Restructuring - Restructuring Expense by Type (Details) - Organizational restructuring - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Restructuring Cost and Reserve [Line Items]
Total restructuring expenses	$ 3	$ 24	$ 22	$ 76
Cumulative Amounts Incurred to Date	498		498
Continuing Operations
Restructuring Cost and Reserve [Line Items]
Total restructuring expenses	3	24	22	76
Cumulative Amounts Incurred to Date	433		433
Discontinued Operations
Restructuring Cost and Reserve [Line Items]
Total restructuring expenses	0	0	0	0
Cumulative Amounts Incurred to Date	65		65
Severance benefits
Restructuring Cost and Reserve [Line Items]
Total restructuring expenses	(2)	5	0	19
Cumulative Amounts Incurred to Date	84		84
Transition Costs
Restructuring Cost and Reserve [Line Items]
Total restructuring expenses	5	$ 19	22	$ 57
Cumulative Amounts Incurred to Date	$ 414		$ 414