Defined Benefit Pension Plan Accounting Policy Change Impact on Consolidated Balance Sheets (Details) (USD $) In Millions, unless otherwise specified	Jan. 02, 2015	Mar. 28, 2014	Dec. 27, 2013	Mar. 29, 2013
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other assets	$ 1,000	$ 986
Earnings retained for use in business	1,101	1,592
Accumulated other comprehensive income	141	279	266	108
Noncontrolling interest in subsidiaries	25	32
Previous accounting methods [Member] | As previously reported [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Earnings retained for use in business	2,402	2,770
Accumulated other comprehensive income	(1,159)	(898)
Noncontrolling interest in subsidiaries	24	31
Impact of change in accounting methods [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Earnings retained for use in business	(1,301)	(1,178)
Accumulated other comprehensive (loss) income	1,300	1,177
Noncontrolling interest in subsidiaries	$ 1	$ 1