Commitments and Contingencies (Commitments) (Details) (USD $) In Millions, unless otherwise specified	Dec. 28, 2012
Guarantor Obligations [Line Items]
Fiscal 2013	$ 164
Fiscal 2014	72
Expiration Of Guarantee In Third Fiscal Year And Thereafter	31
Total	267
Surety Bonds [Member]
Guarantor Obligations [Line Items]
Fiscal 2013	3
Fiscal 2014	29
Expiration Of Guarantee In Third Fiscal Year And Thereafter	0
Total	32
Letters of credit [Member]
Guarantor Obligations [Line Items]
Fiscal 2013	109
Fiscal 2014	28
Expiration Of Guarantee In Third Fiscal Year And Thereafter	16
Total	153
Standby letters of credit [Member]
Guarantor Obligations [Line Items]
Guarantee obligations maximum exposure	82
Fiscal 2013	52
Fiscal 2014	15
Expiration Of Guarantee In Third Fiscal Year And Thereafter	15
Total	$ 82