Defined Benefit Plans [Domain]
Pension Plans, Defined Benefit [Member]Nonqualified Plans, Including Postretirement Health Care Benefits [Member]
Qualified Pension Plan [Member]Nonqualified Pension Plan [Member]Other Postretirement Benefit Plans, Defined Benefit [Member]
2005-01-30 - 2006-01-282005-01-30 - 2006-01-282005-01-30 - 2006-01-28
Defined Benefit Plan Disclosure [Line Items]Defined Benefit Plan, before Adoption of SFAS 158 Recognition Provisions, Net Amount Recognized [Abstract]
Defined Benefit Plan, Funded Status of Plan [Abstract]
Defined Benefit Plan, Funded Status of Plan219,000,000(33,000,000)(105,000,000)
Defined Benefit Plan, before Adoption of SFAS 158 Recognition Provisions, Net Prior Service Costs (Credits), Not yet Recognized32,000,000
Defined Benefit Plan, before Adoption of SFAS 158 Recognition Provisions, Net (Gains) Losses, Not yet Recognized561,000,00016,000,0008,000,000
Defined Benefit Plan, before Adoption of SFAS 158 Recognition Provisions, Net Amount Recognized748,000,000(17,000,000)(97,000,000)