Business Acquisitions, Goodwill and Intangible Assets (Details 4) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Business Acquisitions, Goodwill and Intangible Assets
Total amortization expense	$ 37	$ 40	$ 51
Estimated amortization expense for 2014	43
Estimated amortization expense for 2015	42
Estimated amortization expense for 2016	36
Estimated amortization expense for 2017	32
Estimated amortization expense for 2018	$ 25