Basis of Presentation Income Before Income Tax (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Jul. 03, 2015	Jul. 04, 2014	Apr. 03, 2015
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract]
Gross favorable	$ 22	$ 29
Gross unfavorable	(9)	(10)
Total net adjustments, before taxes and non-controlling interest	$ 13	$ 19
Impact on diluted EPS from continuing operations (usd per share)	$ 0.06	$ 0.06
Unbilled recoverable amounts primarily from governments that are expected to be collected after one year	$ 15		$ 19
Depreciation expense	$ 134	$ 169