Revenues (Timing of Revenue Recognition, Contract Liabilities and Contract Acquisition Costs) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Oct. 04, 2019	Sep. 28, 2018	Oct. 04, 2019	Sep. 28, 2018	Mar. 29, 2019
Disaggregation of Revenue [Line Items]
Revenues	$ 608,000,000	$ 612,000,000	$ 1,258,000,000	$ 1,224,000,000
Revenue recognized from beginning contract liabilities	427,000,000	443,000,000	767,000,000	766,000,000
Amortization expense from capitalized contract acquisition costs	1,000,000	1,000,000	3,000,000	2,000,000
Impairment loss	0	0	0	0
Customer deposit liabilities	390,000,000		390,000,000		$ 505,000,000
Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Revenues	12,000,000	12,000,000	25,000,000	24,000,000
Transferred Over Time
Disaggregation of Revenue [Line Items]
Revenues	$ 596,000,000	$ 600,000,000	$ 1,233,000,000	$ 1,200,000,000