Leases (Lease Cost) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Oct. 04, 2019	Oct. 04, 2019
Leases [Abstract]
Operating lease costs	$ 10	$ 22
Short-term lease costs	2	4
Variable lease costs	5	11
Total lease costs	$ 17	$ 37