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 Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Fair Value of Plan Assets2,075,000,0001,845,000,0001,698,000,00000
Defined Benefit Plan, Actual Return on Plan Assets303,000,000174,000,0000
Defined Benefit Plan, Contributions by Employer3,000,00067,000,0005,000,0005,000,00012,000,00013,000,000
Defined Benefit Plan, Contributions by Plan Participants9,000,00017,000,000
Defined Benefit Plan, Benefits Paid76,000,00094,000,0005,000,0005,000,00021,000,00030,000,000
Defined Benefit Plan, Funded Status of Plan311,000,000219,000,000(36,000,000)(33,000,000)(115,000,000)(105,000,000)