Receivables - Sale of Receivables (Details) - USD ($)	7 Months Ended	12 Months Ended
	Nov. 26, 2015	Mar. 31, 2017	Apr. 01, 2016	Mar. 31, 2017	Dec. 21, 2016	Apr. 21, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable securitization facility, amount					$ 250,000,000
Availability under securitization facility				$ 217,000,000
Gain (loss) on sale of receivables		$ 0
Cash received upon sale of receivables				223,000,000
Deferred purchase price receivable		0	$ 0	252,000,000
Liability recorded due to maximum funding limit being exceeded				$ 6,000,000
Transfer of Financial Assets Accounted for as Sales, Deferred Purchase Price [Roll Forward]
Deferred purchase price receivable, Beginning balance		0
Transfers of receivables		1,195,000,000
Collections		(943,000,000)
Deferred purchase price receivable, Ending balance		$ 252,000,000	0
The Royal Bank of Scotland, PLC
Transfer of Financial Assets Accounted for as Sales, Deferred Purchase Price [Roll Forward]
Receivables purchase facility commitment amount						$ 450,000,000
Other Income
Transfer of Financial Assets Accounted for as Sales, Deferred Purchase Price [Roll Forward]
Purchase discount and administrative fees			1,000,000
The Royal Bank of Scotland, PLC
Transfer of Financial Assets Accounted for as Sales, Deferred Purchase Price [Roll Forward]
Receivables sold	$ 1,500,000,000		$ 1,700,000,000