Defined Benefit Pension Plan Accounting Policy Change Impact on Consolidated Statement of Cash Flows (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Jul. 04, 2014	Jun. 28, 2013
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net income	$ 151	$ 177
(Decrease) increase in liabilities	(135)	(234)
Previous accounting methods
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net income	135
(Decrease) increase in liabilities	(119)
Previous accounting methods | As previously reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net income		159
(Decrease) increase in liabilities		(216)
Impact of change in accounting methods
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net income	16	18
(Decrease) increase in liabilities	$ (16)	$ (18)