Segment Information (Net Revenue By Timing Recognition) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting, Revenue Reconciling Item
Net revenue	$ 1,789	$ 1,673	$ 5,166	$ 4,283
Recognized at a point in time
Segment Reporting, Revenue Reconciling Item
Net revenue	673	860	1,848	1,639
Recognized over time
Segment Reporting, Revenue Reconciling Item
Net revenue	$ 1,116	$ 813	$ 3,318	$ 2,644