STOCKHOLDERS' EQUITY - Accumulated Other Comprehensive Income (Loss) Rollforward (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended							9 Months Ended
	Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	$ (235.8)		$ (203.0)		$ (124.1)			$ (124.1)
Other comprehensive income before reclassifications	89.7		(35.0)		(76.8)
Amounts reclassified from AOCI	(0.1)	[1]	2.2		(2.1)	[1]
Other comprehensive income (loss)	89.6		(32.8)		(78.9)		43.5	(22.1)	16.9
Ending balance	(146.2)		(235.8)		(203.0)			(146.2)
Cumulative Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(103.0)		(64.1)		14.1			14.1
Other comprehensive income before reclassifications	90.7		(38.9)		(75.6)
Amounts reclassified from AOCI	0	[1]	0	[1]	(2.6)	[1]
Other comprehensive income (loss)	90.7		(38.9)		(78.2)
Ending balance	(12.3)		(103.0)		(64.1)			(12.3)
Deriviatve Hedging Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	2.5		(2.7)		(0.4)			(0.4)
Other comprehensive income before reclassifications	2.4		4.8		(2.9)
Amounts reclassified from AOCI	(1.8)	[1]	0.4		0.6	[1]
Other comprehensive income (loss)	0.6		5.2		(2.3)
Ending balance	3.1		2.5		(2.7)			3.1
Unrealized Gains and Losses on Debt and Equity Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	0		0		1.9			1.9
Other comprehensive income before reclassifications	0		0		0
Amounts reclassified from AOCI	0	[1]	0		(1.9)	[1]
Other comprehensive income (loss)	0		0		(1.9)
Ending balance	0		0		0			0
Pension Liability Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(135.3)		(136.2)		(139.7)			(139.7)
Other comprehensive income before reclassifications	(3.4)		(0.9)		1.7
Amounts reclassified from AOCI	1.7	[1]	1.8		1.8	[1]
Other comprehensive income (loss)	(1.7)		0.9		3.5
Ending balance	$ (137.0)		$ (135.3)		$ (136.2)			$ (137.0)

[1] See table on the next page for details about these reclassifications