Strategic Initiatives (Details) - 2-year Restructuring Plan [Member] - USD ($) $ in Millions	24 Months Ended
	Dec. 31, 2021	Mar. 31, 2020
Forecast [Member]
Restructuring Cost and Reserve [Line Items]
Expected period for completion of restructuring plan	2 years
Minimum [Member]
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges, pre-tax		$ 350
Expected restructuring charges, after-tax		265
Maximum [Member]
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges, pre-tax		400
Expected restructuring charges, after-tax		$ 305