Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		69 Months Ended
	Dec. 28, 2018	Dec. 29, 2017	Dec. 28, 2018	Dec. 29, 2017	Sep. 30, 2012	Jan. 31, 2014
Loss Contingencies [Line Items]
Purchase Obligation	$ 1,090		$ 1,090
Transition tax on untaxed foreign earnings			703
Net revenues	1,211	$ 1,209	3,542	$ 3,624
GSA Schedule Contract
Loss Contingencies [Line Items]
Net revenues					$ 222
GSA initial analysis of damage exposure						$ 145
GSA Schedule Contract | Minimum
Loss Contingencies [Line Items]
Estimated loss	$ 25		$ 25