Debt and Credit Facilities (Details Textual) (USD $) In Millions, unless otherwise specified			3 Months Ended						3 Months Ended
	Mar. 31, 2012	Dec. 31, 2011	Mar. 31, 2012 Term Loan A Facility [Member]	Mar. 31, 2012 Term Loan B Facility [Member]	Mar. 31, 2012 Term Loans A and B [Member]	Mar. 31, 2012 Revolving credit facility [Member]	Mar. 31, 2012 Multicurrency term B facility tranche [Member]	Dec. 31, 2011 Multicurrency term B facility tranche [Member]	Mar. 31, 2012 Dollar component [Member] Term Loan B Facility [Member]	Mar. 31, 2012 Dollar component [Member] Multicurrency term B facility tranche [Member]	Mar. 31, 2012 Euro component [Member] Term Loan B Facility [Member]	Mar. 31, 2012 Euro component [Member] Multicurrency term B facility tranche [Member]	Mar. 31, 2012 Dollar Euro Canadian Japanese Yen Component [Member] Revolving credit facility [Member]
Debt and Credit Facilities (Textual) [Abstract]
Unamortized discount					$ 28.0		$ 25.7	$ 26.5
Line of Credit Facility													700
Percentage of Principal Amount of Notes Sold to Investor									98.00%		97.00%
Term period of credit facility			5 years	7 years		5 years
Interest rate in addition to LIBOR or base rate for LIBOR loans			2.50%			2.50%				3.75%		4.50%
Interest rate in addition to LIBOR or base rate for base rate loans			1.50%			1.50%				2.75%		3.50%
Reduction in interest rate for LIBOR loans			2.25%			2.25%
Reduction in interest rate for base rate loans			1.25%			1.25%
Lender fees					48
Percentage of floor to which LIBOR subjected				1.00%
Percentage of EURIBOR subject to floor				1.00%
Non-lender fees					51
Amortization expenses related to the debt instruments					6
Credit facility amount outstanding	34.5	34.5					1,125.7	1,118.8
Additional Debt and Credit Facilities (Textual) [Abstract]
Short-term borrowings	$ 34.5	$ 34.5