FAIR VALUE MEASUREMENTS Fair Value Measurements (Details) - USD ($) $ in Millions |
Oct. 31, 2015 |
Jan. 31, 2015 |
Nov. 01, 2014 |
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |||
| Cash and Cash Equivalents, Fair Value Disclosure | $ 1,106.9 | $ 864.1 | $ 407.6 |
| Short-term investments | 4.0 | 0.0 | 0.0 |
| Restricted Investments Fair Value | 116.4 | 78.9 | 78.9 |
| Diesel Fuel Swaps Liability | 2.3 | 5.7 | 1.1 |
| Long-term Debt, Fair Value | 8,600.0 | 700.9 | 763.2 |
| Fair Value, Inputs, Level 1 [Member] | |||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |||
| Restricted Investments Fair Value | 82.4 | $ 78.9 | $ 78.9 |
| Fair Value, Inputs, Level 2 [Member] | |||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | |||
| Restricted Investments Fair Value | $ 34.0 |
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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. No definition available.
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- Definition The aggregate value of all restricted investments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Investments which are intended to be sold in the short term (usually less than one year or the normal operating cycle, whichever is longer) including trading securities, available-for-sale securities, held-to-maturity securities, and other short-term investments not otherwise listed in the existing taxonomy. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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