Stock-Based Compensation	9 Months Ended
Stock-Based Compensation	Oct. 31, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-Based Compensation	Note 4—Stock-Based Compensation: Stock Options During the nine months ended October 31, 2014, the Company granted employees 0.7 million stock options with a weighted-average exercise price and grant date fair value of $38.81 and $5.91, respectively. These options will expire on the seventh anniversary of the grant date and will generally vest ratably over a three-year period on the anniversary of the grant date. Restricted Stock Units (RSUs) During the nine months ended October 31, 2014, the Company granted employees 0.6 million RSUs with a weighted-average grant date fair value of $38.85, which will generally vest ratably over a four-year period on the anniversary of the grant date. Performance Shares Performance shares are rights to receive amounts denominated in stock upon the satisfaction of service requirements and performance conditions. The performance shares granted cliff vest at the end of a three-year period and the payout is based on the achievement of certain annual and cumulative financial metrics of the Company’s performance, with the number of shares ultimately awarded, if any, ranging up to 150% of the specified target shares. If performance is below the minimum threshold level of performance, no shares will be issued. Compensation expense for performance shares, net of estimated forfeitures, is recognized on a straight-line basis over the three-year performance period based on the expected level of achievement that will be obtained. Compensation expense is adjusted for changes in the expected level of achievement of the performance goals. During the nine months ended October 31, 2014, the Company granted certain employees performance-based stock awards under the 2013 Equity Incentive Plan with a grant date fair value of $38.77 per award. The Company expects to issue 0.1 million shares in the future based on estimated future achievement of the targeted performance goals.

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

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