Goodwill and Other Intangible Assets (Other Intangible Assets) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Dec. 30, 2016	Jan. 01, 2016	Dec. 30, 2016	Jan. 01, 2016	Apr. 01, 2016
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Value	$ 4,055,000,000		$ 4,055,000,000		$ 3,556,000,000
Accumulated Amortization	2,271,000,000		2,271,000,000		2,228,000,000
Net Carrying Value	1,784,000,000		1,784,000,000		1,328,000,000
Amortization expense	81,000,000	$ 75,000,000	243,000,000	$ 214,000,000
Outsourcing contract costs amortization expense	2,000,000	3,000,000	8,000,000	8,000,000
Foreign exchange impact	42,000,000		68,000,000
Gain on sale of intangible asset			0
GIS
Finite-Lived Intangible Assets, Net [Abstract]
Gain on sale of intangible asset				31,000,000
Software
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Value	2,361,000,000		2,361,000,000		2,243,000,000
Accumulated Amortization	1,563,000,000		1,563,000,000		1,531,000,000
Net Carrying Value	798,000,000		798,000,000		712,000,000
Amortization expense	41,000,000	$ 43,000,000	122,000,000	$ 125,000,000
Outsourcing contract costs
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Value	768,000,000		768,000,000		828,000,000
Accumulated Amortization	457,000,000		457,000,000		494,000,000
Net Carrying Value	311,000,000		311,000,000		334,000,000
Customer and other intangible assets
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Value	926,000,000		926,000,000		485,000,000
Accumulated Amortization	251,000,000		251,000,000		203,000,000
Net Carrying Value	$ 675,000,000		$ 675,000,000		$ 282,000,000