Segment Information - Schedule of Reconciliation of Reportable Segment Profit to Consolidated Total (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Less:
Restructuring costs	$ 1	$ 3	$ 3	$ 10
Separation and integration-related costs	19	27	84	44
Interest expense, net	37	0	84	7
Income before taxes	48	45	125	163
Operating segments
Segment Reporting Information [Line Items]
Total profit for reportable segments	111	79	275	228
Corporate
Less:
Stock-based compensation	4	4	7	4
Restructuring costs	1	3	1	10
Separation and integration-related costs	19	27	84	44
Interest expense, net	37	0	84	7
Other unallocated, net	$ 2	$ 0	$ (26)	$ 0