Annual report pursuant to Section 13 and 15(d)

Share-Based Compensation (Details 3)

v2.4.1.9
Share-Based Compensation (Details 3) (USD $)
In Millions, except Per Share data, unless otherwise specified
12 Months Ended
Jan. 31, 2015
Minimum  
Share-Based Compensation  
Vesting period 4 years
Maximum  
Share-Based Compensation  
Vesting period 5 years
Restricted stock  
Restricted Shares-Number of Shares  
Outstanding at beginning of year 0.8us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
Granted 0.3us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
Vested (0.2)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
Outstanding at end of year 0.9us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
Restricted Shares-Weighted Average Fair Value  
Outstanding at beginning of year (in dollars per share) 17.07us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
Granted (in dollars per share) 16.04us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
Vested (in dollars per share) 16.64us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
Forfeited (in dollars per share) 16.49us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
Outstanding at end of year (in dollars per share) 16.79us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
Restricted stock | Board of Directors  
Share-Based Compensation  
Vesting period 1 year
Restricted stock | Minimum | Employee  
Share-Based Compensation  
Vesting period 4 years
Restricted stock | Maximum | Employee  
Share-Based Compensation  
Vesting period 5 years