Commitments and Contingencies (Lease Commitments) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 30, 2011 years	Dec. 31, 2010	Dec. 25, 2009
Operating Leased Assets [Line Items]
Maximum lease term	30
Operating Leases, Rent Expense, Net [Abstract]
Equipment and Other Rents	$ 379	$ 374	$ 391
Operating Leases [Abstract]
2012	102
2013	74
2014	78
2015	26
2016	24
Thereafter	155
Total	459
Sublease Income [Abstract]
2012	(36)
2013	(31)
2014	(18)
2015	0
2016	0
Thereafter	0
Total	85
Net Lease Commitments [Abstract]
2012	66
2013	43
2014	60
2015	26
2016	24
Thereafter	155
Total	374
Net Daily Rental Charges [Member]
Operating Leases, Rent Expense, Net [Abstract]
Equipment and Other Rents	311	307	307
Rent Expense on Operating Leases [Member]
Operating Leases, Rent Expense, Net [Abstract]
Equipment and Other Rents	68	67	84
Horizon Lines, Inc. [Member]
Operating Leases, Rent Expense, Net [Abstract]
Equipment and Other Rents	86
Net Lease Commitments [Abstract]
Sublease Income	$ 77