Income Taxes - Operating Loss and Tax Credit Carryforwards (Details) - USD ($) $ in Millions	Mar. 31, 2017	Apr. 01, 2016
Federal
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 65	$ 42
Net operating loss carryforward with no expiration	0	0
Net operating loss carryforward with expiration	65	42
Tax credit carryforwards	7	7
Tax credit carryforwards with no expiration	0	0
Tax credit carryforwards with expiration	7	7
Capital loss carryforwards	0	0
Capital loss carryforwards with no expiration	0	0
Capital loss carryforwards with expiration	0	0
State
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	911	556
Net operating loss carryforward with no expiration	0	0
Net operating loss carryforward with expiration	911	556
Tax credit carryforwards	45	42
Tax credit carryforwards with no expiration	10	10
Tax credit carryforwards with expiration	35	32
Capital loss carryforwards	289	258
Capital loss carryforwards with no expiration	0	0
Capital loss carryforwards with expiration	289	258
Foreign
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	4,608	4,045
Net operating loss carryforward with no expiration	4,537	3,986
Net operating loss carryforward with expiration	71	59
Tax credit carryforwards	10	0
Tax credit carryforwards with no expiration	0	0
Tax credit carryforwards with expiration	10	0
Capital loss carryforwards	235	73
Capital loss carryforwards with no expiration	235	73
Capital loss carryforwards with expiration	$ 0	$ 0