Schedule II - Valuation and Qualifying Accounts (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Allowance for Doubtful Accounts
Valuation and Qualifying Accounts
Balance at beginning of year	$ 19	$ 18	$ 20
Charged to costs and expenses	7	4	7
Deductions from reserves	(4)	(3)	(9)
Balance at end of year	22	19	18
Inventory FIFO reserves
Valuation and Qualifying Accounts
Balance at beginning of year	136	134	133
Charged to costs and expenses	54	42	35
Deductions from reserves	(40)	(40)	(34)
Balance at end of year	$ 150	$ 136	$ 134