Strategic Initiatives - Narrative (Details) - Restructuring Plan - USD ($) $ in Millions	12 Months Ended		36 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2022
Restructuring Cost and Reserve [Line Items]
Restructuring charges recorded to date	$ 569
Restructuring charges	289	$ 280
Forecast
Restructuring Cost and Reserve [Line Items]
Expected period for completion of restructuring plan			3 years
Minimum
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges, pre-tax	780
Expected restructuring charges, after-tax	590
Maximum
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges, pre-tax	860
Expected restructuring charges, after-tax	$ 650