Retirement Benefits	3 Months Ended
Apr. 30, 2011
Retirement Benefits
Retirement Benefits	14. Retirement Benefits The Company sponsors a tax-qualified defined contribution retirement plan and a non-qualified supplemental retirement plan for substantially all of its associates within the United States of America. Participation in the tax-qualified plan is available to associates who meet certain age and service requirements. Participation in the non-qualified plan is made available to associates who meet certain age, service, job level and compensation requirements. The qualified plan permits participating associates to elect contributions up to the maximum limits allowable under the Internal Revenue Code. The Company matches associate contributions according to a predetermined formula and contributes additional amounts based on a percentage of the associates' eligible annual compensation and years of service. Associate contributions and Company matching contributions vest immediately. Additional Company contributions and the related investment earnings are subject to vesting based on years of service. Total expense recognized related to the qualified plan was $14 million and $13 million for the first quarter of 2011 and 2010, respectively. The non-qualified plan is an unfunded plan which provides benefits beyond the Internal Revenue Code limits for qualified defined contribution plans. The plan permits participating associates to elect contributions up to a maximum percentage of eligible compensation. The Company matches associate contributions according to a predetermined formula and contributes additional amounts based on a percentage of the associates' eligible compensation and years of service. The plan also permits participating associates to defer additional compensation up to a maximum amount which the Company does not match. Associates' accounts are credited with interest using a rate determined by the Company. Associate contributions and the related interest vest immediately. Company contributions, along with related interest, are subject to vesting based on years of service. Associates may elect in-service distributions for the unmatched additional deferred compensation component only. The remaining vested portion of associates' accounts in the plan will be distributed upon termination of employment in either a lump sum or in annual installments over a specified period of up to 10 years. Total expense recognized related to the non-qualified plan was $6 million for both the first quarter of 2011 and 2010.

The entire disclosure for pension and other postretirement benefits.

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