STOCKHOLDERS' EQUITY - Accumulated Other Comprehensive Income (Loss) Rollforward (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	$ (75.4)	$ (235.8)	$ (116.5)	$ (124.1)
Other comprehensive income before reclassifications	(171.4)	89.7	(133.9)	(22.1)
Amounts reclassified from AOCI	0.6	(0.1)	4.2	0
Other comprehensive income (loss)	(170.8)	89.6	(129.7)	(22.1)
Ending balance	(246.2)	(146.2)	(246.2)	(146.2)
Cumulative Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	33.8	(103.0)	(7.9)	14.1
Other comprehensive income before reclassifications	(176.3)	90.7	(138.6)	(23.8)
Amounts reclassified from AOCI	0	0	4.0	(2.6)
Other comprehensive income (loss)	(176.3)	90.7	(134.6)	(26.4)
Ending balance	(142.5)	(12.3)	(142.5)	(12.3)
Deriviatve Hedging Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	0.5	2.5	2.7	(0.4)
Other comprehensive income before reclassifications	(0.1)	2.4	0.3	4.3
Amounts reclassified from AOCI	(0.2)	(1.8)	(2.8)	(0.8)
Other comprehensive income (loss)	(0.3)	0.6	(2.5)	3.5
Ending balance	0.2	3.1	0.2	3.1
Unrealized Gains and Losses on Debt and Equity Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	0	0	0	1.9
Other comprehensive income before reclassifications	0.1	0	0.1	0
Amounts reclassified from AOCI	0	0	0	(1.9)
Other comprehensive income (loss)	0.1	0	0.1	(1.9)
Ending balance	0.1	0	0.1	0
Pension Liability Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(109.7)	(135.3)	(111.3)	(139.7)
Other comprehensive income before reclassifications	4.9	(3.4)	4.3	(2.6)
Amounts reclassified from AOCI	0.8	1.7	3.0	5.3
Other comprehensive income (loss)	5.7	(1.7)	7.3	2.7
Ending balance	$ (104.0)	$ (137.0)	$ (104.0)	$ (137.0)