Segment Information (Details) $ in Millions	3 Months Ended			9 Months Ended
	Dec. 30, 2016 USD ($) Segment	Jan. 01, 2016 USD ($)		Dec. 30, 2016 USD ($) Segment	Jan. 01, 2016 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | Segment	2			2
Revenues	$ 1,917	$ 1,750	[1]	$ 5,718	$ 5,299	[1]
Consolidated segment operating income	165	148		315	422
Depreciation and amortization	161	161	[1]	494	503	[1]
Corporate
Segment Reporting Information [Line Items]
Revenues	0	0		0	0
Consolidated segment operating income	(12)	(23)		(40)	(64)
Depreciation and amortization	16	11		48	30
GBS | Operating Segments
Segment Reporting Information [Line Items]
Revenues	1,046	886		3,130	2,696
Consolidated segment operating income	113	101		269	299
Depreciation and amortization	38	33		115	93
GIS | Operating Segments
Segment Reporting Information [Line Items]
Revenues	871	864		2,588	2,603
Consolidated segment operating income	64	70		86	187
Depreciation and amortization	$ 107	$ 117		$ 331	$ 380

[1] Certain prior year balances were adjusted for certain errors in previously issued financial statements related to income taxes and for the adoption of ASU 2016-09 related to employee stock-based compensation. See Note 20 - Reconciliation of Previously Reported Amounts.