Accounts Receivable and Finance Receivables (Details 10) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Jan. 01, 2011
Summary of captive finance receivables for the inventory sales
Total	$ 1,617	$ 1,890
Installment contracts [Member]
Summary of captive finance receivables for the inventory sales
Total	1,488	1,652
Finance leases [Member]
Summary of captive finance receivables for the inventory sales
Total	121	220
Distribution finance receivables [Member]
Summary of captive finance receivables for the inventory sales
Total	$ 8	$ 18