INCOME TAXES - Reconciliation of Unrecognized Tax Benefits (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at January 1,	$ 30.7us-gaap_UnrecognizedTaxBenefits	$ 32.6us-gaap_UnrecognizedTaxBenefits
Gross increases related to positions taken in the current year	2.2	3.9
Gross increases related to positions taken in prior periods	1.4	1.6
Increases related to acquisitions	0	0.2
Decreases related to settlements with taxing authorities	(0.8)	(2.3)
Decreases due to lapse of statutes of limitation related to state tax and foreign items	(3.3)	(4.1)
Decreases related to positions taken in the current year	(6.0)	(1.2)
Balance at December 31,	$ 24.2us-gaap_UnrecognizedTaxBenefits	$ 30.7us-gaap_UnrecognizedTaxBenefits

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Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Unrecognized Tax Benefit

-URI http://asc.fasb.org/extlink&oid=6527854

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Amount of decrease in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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-Publisher FASB

-Name Accounting Standards Codification

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Amount of increase in unrecognized tax benefits resulting from acquisitions.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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