Defined Benefit Plans [Domain]
Pension Plans, Defined Benefit [Member]Nonqualified Plans, Including Postretirement Health Care Benefits [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 - 2005-01-29
Defined Benefit Plan Disclosure [Line Items]Defined Benefit Plan, Assumptions Used in Calculations [Abstract]
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate5.80%5.75%5.80%5.75%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase4.00%3.50%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate5.75%5.75%6.25%5.75%5.75%6.25%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets8.00%8.00%8.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase3.50%2.75%3.25%