PENSIONS AND POSTRETIREMENT BENEFITS (Effect of Fair Value Measurements Using Significant Unobservable Inputs (Level 3) on Changes in Pension Plan Assets) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Roll Forward]
Fair value of plan assets — beginning of year	$ 192.2	$ 186.0
Actual return on plan assets:
Relating to assets still held at the reporting date	21.8	7.0
Relating to assets sold during the period	(0.8)	4.0
Purchases	14.4	40.2
Sales	(27.1)	(45.0)
Fair value of plan assets — end of year	200.5	192.2
Hedge Funds [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Roll Forward]
Fair value of plan assets — beginning of year	100.7	105.8
Actual return on plan assets:
Relating to assets still held at the reporting date	4.2	(2.4)
Relating to assets sold during the period	(0.3)	0.5
Purchases	0	35.8
Sales	(19.0)	(39.0)
Fair value of plan assets — end of year	85.6	100.7
Private Equity Funds [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Roll Forward]
Fair value of plan assets — beginning of year	30.1	25.0
Actual return on plan assets:
Relating to assets still held at the reporting date	1.4	2.6
Relating to assets sold during the period	0	3.0
Purchases	2.2	4.4
Sales	(4.4)	(4.9)
Fair value of plan assets — end of year	29.3	30.1
Structured Finance [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Roll Forward]
Fair value of plan assets — beginning of year	44.9	39.7
Actual return on plan assets:
Relating to assets still held at the reporting date	11.3	5.2
Relating to assets sold during the period	0	0
Purchases	0	0
Sales	0	0
Fair value of plan assets — end of year	56.2	44.9
Real Estate [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Roll Forward]
Fair value of plan assets — beginning of year	16.5	15.5
Actual return on plan assets:
Relating to assets still held at the reporting date	4.9	1.6
Relating to assets sold during the period	(0.5)	0.5
Purchases	12.2	0
Sales	(3.7)	(1.1)
Fair value of plan assets — end of year	$ 29.4	$ 16.5