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]
2006-01-29 - 2007-02-032005-01-30 - 2006-01-282004-02-01 - 2005-01-292006-01-29 - 2007-02-032005-01-30 - 2006-01-282004-02-01 - 2005-01-292006-01-29 - 2007-02-032005-01-30 - 2006-01-282004-02-01 - 2005-01-29
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Benefit Obligation1,764,000,0001,626,000,0001,515,000,00036,000,00033,000,00034,000,000115,000,000105,000,000107,000,000
Defined Benefit Plan, Service Cost82,000,00066,000,0001,000,0001,000,0003,000,0002,000,0003,000,000
Defined Benefit Plan, Interest Cost91,000,00085,000,0002,000,0002,000,0006,000,0006,000,0007,000,000
Defined Benefit Plan, Contributions by Plan Participants9,000,00017,000,00017,000,000
Defined Benefit Plan, Actuarial Net (Gains) Losses32,000,00055,000,0005,000,0004,000,00013,000,0003,000,0003,000,000
Defined Benefit Plan, Benefits Paid76,000,00094,000,0005,000,0005,000,00021,000,00030,000,00030,000,000
Defined Benefit Plan, Plan Amendments9,000,000(1,000,000)(3,000,000)