Divestitures (Summary of Operating Results of NPS) (Details) - NPS - Discontinued Operations, Disposed of by Means Other than Sale, Spinoff - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Jan. 01, 2016	Jan. 01, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues	$ 580	$ 2,504
Costs of services	(446)	(1,935)
Selling, general and administrative	(15)	(52)
Depreciation and amortization	(23)	(90)
Restructuring costs	0	(1)
Separation and merger costs	(47)	(103)
Interest expense	(4)	(15)
Other income, net	(1)	21
Total income from discontinued operations before income taxes	44	329
Income tax expense	(14)	(113)
Total income from discontinued operations	$ 30	$ 216