PENSION AND POST-RETIREMENT BENEFITS Saving Plans and Post Retirement Benefits - Fair Value of Asset Categories (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	$ 567.7		$ 557.6
Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	146.0		148.2
Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	421.7		407.5
Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0		1.9
Group Annuity Contract [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	2.8		2.6
Group Annuity Contract [Member] | Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0		0
Group Annuity Contract [Member] | Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	2.8		2.6
Group Annuity Contract [Member] | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0		0
Corporate Bond Securities [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	17.5	[1]	24.4	[1]
Corporate Bond Securities [Member] | Mutual Funds [Member] | Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	17.5	[1]	24.4	[1]
Corporate Bond Securities [Member] | Mutual Funds [Member] | Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]
Corporate Bond Securities [Member] | Mutual Funds [Member] | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]
Corporate Bond Securities [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	55.0		46.1
Corporate Bond Securities [Member] | Fixed Income Securities [Member] | Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0.1		0
Corporate Bond Securities [Member] | Fixed Income Securities [Member] | Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	54.9		45.8
Corporate Bond Securities [Member] | Fixed Income Securities [Member] | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0		0.3
Corporate Bond Securities [Member] | Common And Collective Investment Trust Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	75.4	[1]	53.7	[1]
Corporate Bond Securities [Member] | Common And Collective Investment Trust Fund [Member] | Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]
Corporate Bond Securities [Member] | Common And Collective Investment Trust Fund [Member] | Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	75.4	[1]	53.7	[1]
Corporate Bond Securities [Member] | Common And Collective Investment Trust Fund [Member] | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]
Corporate Bond Securities [Member] | Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	6.8	[1]	11.8	[1]
Corporate Bond Securities [Member] | Hedge Funds [Member] | Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]
Corporate Bond Securities [Member] | Hedge Funds [Member] | Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	6.8	[1]	11.8	[1]
Corporate Bond Securities [Member] | Hedge Funds [Member] | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]
Government Bond [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	13.6	[1]	15.1	[1]
Government Bond [Member] | Mutual Funds [Member] | Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	13.6	[1]	15.1	[1]
Government Bond [Member] | Mutual Funds [Member] | Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]
Government Bond [Member] | Mutual Funds [Member] | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]
Government Bond [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	10.9		9.6
Government Bond [Member] | Fixed Income Securities [Member] | Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0		0
Government Bond [Member] | Fixed Income Securities [Member] | Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	10.9		8.0
Government Bond [Member] | Fixed Income Securities [Member] | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0		1.6
Government Bond [Member] | Common And Collective Investment Trust Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	60.0	[1]	69.8	[1]
Government Bond [Member] | Common And Collective Investment Trust Fund [Member] | Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]
Government Bond [Member] | Common And Collective Investment Trust Fund [Member] | Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	60.0	[1]	69.8	[1]
Government Bond [Member] | Common And Collective Investment Trust Fund [Member] | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]
Government Bond [Member] | Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	(8.8)	[1]	24.5	[1]
Government Bond [Member] | Hedge Funds [Member] | Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]
Government Bond [Member] | Hedge Funds [Member] | Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	(8.8)	[1]	24.5	[1]
Government Bond [Member] | Hedge Funds [Member] | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]
Us Large Cap Equity Securities [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	68.5	[1]	68.7	[1]
Us Large Cap Equity Securities [Member] | Mutual Funds [Member] | Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	68.5	[1]	68.7	[1]
Us Large Cap Equity Securities [Member] | Mutual Funds [Member] | Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]
Us Large Cap Equity Securities [Member] | Mutual Funds [Member] | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]
Us Large Cap Equity Securities [Member] | Common And Collective Investment Trust Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	24.3	[1]	33.8	[1]
Us Large Cap Equity Securities [Member] | Common And Collective Investment Trust Fund [Member] | Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]
Us Large Cap Equity Securities [Member] | Common And Collective Investment Trust Fund [Member] | Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	24.3	[1]	33.8	[1]
Us Large Cap Equity Securities [Member] | Common And Collective Investment Trust Fund [Member] | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]
Us Large Cap Equity Securities [Member] | Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	9.1	[1]	4.3	[1]
Us Large Cap Equity Securities [Member] | Hedge Funds [Member] | Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]
Us Large Cap Equity Securities [Member] | Hedge Funds [Member] | Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	9.1	[1]	4.3	[1]
Us Large Cap Equity Securities [Member] | Hedge Funds [Member] | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]
International Equity [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	7.3	[1]	4.3	[1]
International Equity [Member] | Mutual Funds [Member] | Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	7.3	[1]	4.3	[1]
International Equity [Member] | Mutual Funds [Member] | Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]
International Equity [Member] | Mutual Funds [Member] | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]
International Equity [Member] | Common And Collective Investment Trust Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	89.9	[1]	92.1	[1]
International Equity [Member] | Common And Collective Investment Trust Fund [Member] | Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]
International Equity [Member] | Common And Collective Investment Trust Fund [Member] | Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	89.9	[1]	92.1	[1]
International Equity [Member] | Common And Collective Investment Trust Fund [Member] | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]
International Equity [Member] | Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	15.9	[1]	6.1	[1]
International Equity [Member] | Hedge Funds [Member] | Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]
International Equity [Member] | Hedge Funds [Member] | Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	15.9	[1]	6.1	[1]
International Equity [Member] | Hedge Funds [Member] | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]
Emerging Markets International Equity [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	6.1	[1]	4.2	[1]
Emerging Markets International Equity [Member] | Mutual Funds [Member] | Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	6.1	[1]	4.2	[1]
Emerging Markets International Equity [Member] | Mutual Funds [Member] | Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]
Emerging Markets International Equity [Member] | Mutual Funds [Member] | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]
Emerging Markets International Equity [Member] | Common And Collective Investment Trust Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	17.6	[1]	17.3	[1]
Emerging Markets International Equity [Member] | Common And Collective Investment Trust Fund [Member] | Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]
Emerging Markets International Equity [Member] | Common And Collective Investment Trust Fund [Member] | Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	17.6	[1]	17.3	[1]
Emerging Markets International Equity [Member] | Common And Collective Investment Trust Fund [Member] | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]
Emerging Markets International Equity [Member] | Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	4.1	[1]
Emerging Markets International Equity [Member] | Hedge Funds [Member] | Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]
Emerging Markets International Equity [Member] | Hedge Funds [Member] | Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	4.1	[1]
Emerging Markets International Equity [Member] | Hedge Funds [Member] | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]
Other Plan Assets [Member] | Mutual Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	3.1	[1]	0.9	[1]
Other Plan Assets [Member] | Mutual Funds [Member] | Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	3.1	[1]	0.9	[1]
Other Plan Assets [Member] | Mutual Funds [Member] | Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]
Other Plan Assets [Member] | Mutual Funds [Member] | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]
Other Plan Assets [Member] | Common And Collective Investment Trust Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	3.1	[1]	2.9	[1]
Other Plan Assets [Member] | Common And Collective Investment Trust Fund [Member] | Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]
Other Plan Assets [Member] | Common And Collective Investment Trust Fund [Member] | Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	3.1	[1]	2.9	[1]
Other Plan Assets [Member] | Common And Collective Investment Trust Fund [Member] | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]
Other Plan Assets [Member] | Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	4.2	[1]	4.1	[1]
Other Plan Assets [Member] | Hedge Funds [Member] | Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]
Other Plan Assets [Member] | Hedge Funds [Member] | Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	4.2	[1]	4.1	[1]
Other Plan Assets [Member] | Hedge Funds [Member] | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]
Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	9.3		7.5
Cash and Cash Equivalents [Member] | Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	9.3		7.5
Cash and Cash Equivalents [Member] | Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0		0
Cash and Cash Equivalents [Member] | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0		0
Cash and Cash Equivalents [Member] | Common And Collective Investment Trust Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	3.7	[1]	2.0	[1]
Cash and Cash Equivalents [Member] | Common And Collective Investment Trust Fund [Member] | Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]
Cash and Cash Equivalents [Member] | Common And Collective Investment Trust Fund [Member] | Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	3.7	[1]	2.0	[1]
Cash and Cash Equivalents [Member] | Common And Collective Investment Trust Fund [Member] | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]
Cash and Cash Equivalents [Member] | Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	26.8	[1]	5.7	[1]
Cash and Cash Equivalents [Member] | Hedge Funds [Member] | Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]
Cash and Cash Equivalents [Member] | Hedge Funds [Member] | Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	26.8	[1]	5.7	[1]
Cash and Cash Equivalents [Member] | Hedge Funds [Member] | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]
U S Small Mid Cap Equity [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	20.5		23.1
U S Small Mid Cap Equity [Member] | Equity Securities [Member] | Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	20.5		23.1
U S Small Mid Cap Equity [Member] | Equity Securities [Member] | Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0		0
U S Small Mid Cap Equity [Member] | Equity Securities [Member] | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0		0
U S Small Mid Cap Equity [Member] | Common And Collective Investment Trust Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	21.0	[1]	23.0	[1]
U S Small Mid Cap Equity [Member] | Common And Collective Investment Trust Fund [Member] | Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]
U S Small Mid Cap Equity [Member] | Common And Collective Investment Trust Fund [Member] | Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	21.0	[1]	23.0	[1]
U S Small Mid Cap Equity [Member] | Common And Collective Investment Trust Fund [Member] | Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	$ 0	[1]	$ 0	[1]

[1] (a) The investments in mutual funds, common and collective funds and hedge funds are disclosed above within the respective underlying investments’ class (i.e., various equities, corporate bonds, government bonds and other investment classes), while the fair value hierarchy levels of the investments are based on the Company’s direct ownership unit of account.