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Subsequent Event (Notes) | 9 Months Ended
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Oct. 31, 2015
Subsequent Event [Line Items] |
Subsequent Events [Text Block] | Subsequent Events Subsequent to October 31, 2015, the Company repurchased an additional 1.2 million shares of common stock for $109 million under the June 2015 repurchase program. For additional information, see Note 3, "Earnings Per Share and Shareholders' Equity (Deficit)."

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration