Share Repurchases	9 Months Ended
Oct. 31, 2015
Equity [Abstract]
Share Repurchases	Share Repurchases In December 2013, we announced a $300.0 million share repurchase authorization, and immediately prior to the execution of the accelerated stock repurchase agreements ("ASR Agreements") described below, we had $290.0 million remaining under the existing authority. In March 2015, we entered into ASR Agreements with each of Merrill Lynch, Pierce, Fenner and Smith Incorporated ("Merrill Lynch"), as agent for Merrill Lynch International, and J.P. Morgan Securities, LLC ("JP Morgan"), as agent for JPMorgan Chase Bank, N.A., to purchase $250.0 million in outstanding shares of our common stock. Under the ASR Agreements, we made a payment of approximately $125.0 million to each of Merrill Lynch and JP Morgan and received from each of them an initial delivery of approximately 5.35 million common shares. The value of the initial shares received on the date of purchase was approximately $187.5 million. In the second quarter of fiscal 2015, Merrill Lynch and JP Morgan delivered an additional 3.9 million shares upon completion of the ASR Agreements, valued at approximately $62.5 million. We accounted for the ASR Agreements as treasury stock repurchase transactions, reducing the shares outstanding by the 10.7 million common shares initially repurchased and resulted in an immediate reduction of the outstanding shares used to calculate the weighted-average common shares outstanding for basic and diluted earnings per share. The additional 3.9 million shares delivered resulted in a reduction of the outstanding shares on the date of delivery in the second quarter of fiscal 2015. Following the consummation of the ASR Agreements, we had approximately $40.0 million remaining under our share repurchase program. The repurchase program has no specific termination date and will expire when we have repurchased all securities authorized for repurchase thereunder, unless terminated earlier by our Board of Directors. There were no share repurchases during the third quarter of fiscal 2015.

Share Repurchases

In December 2013, we announced a $300.0 million share repurchase authorization, and immediately prior to the execution of the accelerated stock repurchase agreements ("ASR Agreements") described below, we had $290.0 million remaining under the existing authority.

In March 2015, we entered into ASR Agreements with each of Merrill Lynch, Pierce, Fenner and Smith Incorporated ("Merrill Lynch"), as agent for Merrill Lynch International, and J.P. Morgan Securities, LLC ("JP Morgan"), as agent for JPMorgan Chase Bank, N.A., to purchase $250.0 million in outstanding shares of our common stock. Under the ASR Agreements, we made a payment of approximately $125.0 million to each of Merrill Lynch and JP Morgan and received from each of them an initial delivery of approximately 5.35 million common shares. The value of the initial shares received on the date of purchase was approximately $187.5 million. In the second quarter of fiscal 2015, Merrill Lynch and JP Morgan delivered an additional 3.9 million shares upon completion of the ASR Agreements, valued at approximately $62.5 million.

We accounted for the ASR Agreements as treasury stock repurchase transactions, reducing the shares outstanding by the 10.7 million common shares initially repurchased and resulted in an immediate reduction of the outstanding shares used to calculate the weighted-average common shares outstanding for basic and diluted earnings per share. The additional 3.9 million shares delivered resulted in a reduction of the outstanding shares on the date of delivery in the second quarter of fiscal 2015.

Following the consummation of the ASR Agreements, we had approximately $40.0 million remaining under our share repurchase program. The repurchase program has no specific termination date and will expire when we have repurchased all securities authorized for repurchase thereunder, unless terminated earlier by our Board of Directors. There were no share repurchases during the third quarter of fiscal 2015.