ACCUMULATED OTHER COMPREHENSIVE LOSS - ROLLFORWARD (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Changes in accumulated other comprehensive loss
Accumulated other comprehensive loss, balance at beginning of period	$ (23.2)	$ (40.9)
Other comprehensive income (loss) before reclassifications	(0.1)	0.1
Amounts reclassified out of accumulated other comprehensive loss	(0.3)	1.5
Net current period other comprehensive income (loss)	(0.4)	1.6
Accumulated other comprehensive loss, balance at end of period	(23.6)	(39.3)
Cash flow hedges
Changes in accumulated other comprehensive loss
Accumulated other comprehensive loss, balance at beginning of period	(3.1)	(5.2)
Other comprehensive income (loss) before reclassifications	0	0.1
Amounts reclassified out of accumulated other comprehensive loss	(0.6)	0.9
Net current period other comprehensive income (loss)	(0.6)	1.0
Accumulated other comprehensive loss, balance at end of period	(3.7)	(4.2)
Defined benefit plans
Changes in accumulated other comprehensive loss
Accumulated other comprehensive loss, balance at beginning of period	(20.1)	(35.7)
Other comprehensive income (loss) before reclassifications	(0.1)	0
Amounts reclassified out of accumulated other comprehensive loss	0.3	0.6
Net current period other comprehensive income (loss)	0.2	0.6
Accumulated other comprehensive loss, balance at end of period	$ (19.9)	$ (35.1)