FAIR VALUES Part I (Details) (Measured on a recurring basis [Member], USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Total assets	$ 8.6	$ 13.3
Total liabilities	44.9	481.1
Level 1 [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Total assets	8.4	7.5
Total liabilities	8.6	7.7
Level 2 [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Total assets	0.2	5.8
Total liabilities	0	263.0
Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Total assets	0	0
Total liabilities	36.3	210.4
Prepaid Expenses and Other Current Assets [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Rabbi Trust assets	8.4	7.5
Prepaid Expenses and Other Current Assets [Member] | Level 1 [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Rabbi Trust assets	8.4	7.5
Accrued Employee Compensation and Benefits [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Rabbi Trust liabilities	8.4	7.5
Accrued Employee Compensation and Benefits [Member] | Level 1 [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Rabbi Trust liabilities	8.4	7.5
Current Portion of Acquisition Consideration Payable [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Acquisition consideration	30.3	192.7
Current Portion of Acquisition Consideration Payable [Member] | Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Acquisition consideration	30.3	192.7
Accrued Expenses and Other Current Liabilities [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Deferred director fees	0.2	0.2
Accrued Expenses and Other Current Liabilities [Member] | Level 1 [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Deferred director fees	0.2	0.2
Long-term Debt [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
5.125% Senior Notes due 2014		263.0
Long-term Debt [Member] | Level 2 [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
5.125% Senior Notes due 2014		263.0
Acquisition Consideration Payable, Net of Current Portion [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Acquisition consideration	6.0	17.7
Acquisition Consideration Payable, Net of Current Portion [Member] | Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Acquisition consideration	6.0	17.7
British Pound - U.S. Dollar Forward Exchange Contracts [Member] | Prepaid Expenses and Other Current Assets [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Derivative Asset	0
Interest Rate Swaps [Member] | Other Long-term Assets [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Derivative Asset		5.5
Interest Rate Swaps [Member] | Other Long-term Assets [Member] | Level 2 [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Derivative Asset		5.5
Interest Rate Cap [Member] | Other Long-term Assets [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Derivative Asset	0	0.2
Interest Rate Cap [Member] | Other Long-term Assets [Member] | Level 2 [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Derivative Asset		0.2
Canadian Dollar - U.S. Dollar Forward Contracts [Member] | Prepaid Expenses and Other Current Assets [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Derivative Asset	0.2	0.1
Canadian Dollar - U.S. Dollar Forward Contracts [Member] | Prepaid Expenses and Other Current Assets [Member] | Level 2 [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Derivative Asset	$ 0.2	$ 0.1