Employee Benefit Plans Pension and Other Postretirement Benefits (Details) (USD $)	12 Months Ended
	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Pension and Other Postretirement Defined Benefit Plans, Current Liabilities	$ 5,051,000	$ 4,834,000
Pension/postretirement benefit obligations	268,112,000	361,246,000
Health Care Cost Trend Rate	4.75%
Deferred Compensation Arrangement with Individual, Recorded Liability	27,828,000	24,463,000
Qualified Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Average Compensation Term Of Employment	five years of the last 10 years
Years of Service	10 years
Employer Contribution	30,000,000
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year	30,000,000
Excess Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Years of Service	10 years
SRIP
Defined Benefit Plan Disclosure [Line Items]
Years of Service	10 years
Japan [Member]
Defined Benefit Plan Disclosure [Line Items]
Years of Service	three years
EPSRS [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Cost Recognized	3,925,000	0	3,150,000
Retirement Savings Feature of EPSRS [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Cost Recognized	7,088,000	7,278,000	6,968,000
Employees Contribution Percentage	50.00%
Percentage Of Matching Contribution Made By Company Of First Six Percentage Of Participating Employees Contribution	50.00%
Percentage Of Participating Employees Contribution Fifty Percent Matched By Employer	6.00%
Employee Profit Sharing and Retirement Savings Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Percent Investment In Company Stock	26.00%
Defined Contribution Retirement Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Cost Recognized	$ 3,640,000	$ 3,387,000	$ 2,926,000
Equity Securities [Member] | Qualified Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Plan Asset Allocations Range Minimum	60.00%
Target Plan Asset Allocations Range Maximum	70.00%
Debt Securities [Member] | Qualified Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Plan Asset Allocations Range Minimum	20.00%
Target Plan Asset Allocations Range Maximum	30.00%
Other Investments [Member] | Qualified Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Plan Asset Allocations Range Minimum	5.00%
Target Plan Asset Allocations Range Maximum	15.00%
Pre-age 65 [Member]
Defined Benefit Plan Disclosure [Line Items]
Health Care Cost Trend Rate Assumed for Next Fiscal Year	7.00%
Post-age 65 [Member]
Defined Benefit Plan Disclosure [Line Items]
Health Care Cost Trend Rate Assumed for Next Fiscal Year	6.25%