Debt - Credit Facilities (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended					3 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2011 financialinstitutions	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2011 LIBOR Rate Advances [Member]	Dec. 31, 2011 Base Rate Advance [Member]	Dec. 31, 2010 Tranche B Term Loan [Member]	Dec. 31, 2010 Tranche B Term Loan [Member]	Dec. 31, 2010 Previous Term Loan Facility [Member]	Dec. 31, 2009 Previous Term Loan Facility [Member]	Dec. 31, 2011 Commitment Fee Revolving Credit Facility [Member]	Dec. 31, 2011 Commitment Fee Letter of Credit [Member]	Dec. 31, 2010 Line of Credit [Member]	Dec. 31, 2009 Line of Credit [Member]	Dec. 31, 2011 Receivables Facilities [Member]	Dec. 31, 2010 Receivables Facilities [Member]	Dec. 31, 2009 Receivables Facilities [Member]
Line of Credit Facility [Line Items]
Proceeds from Issuance of Long-term Debt		$ 0	$ 2,134.3	$ 492.8				$ 760.0
Line of credit facility, maximum borrowing capacity	210.0	210.0
Use of net proceeds from Term Loan								737
Repayment of term loan facilities			204.3
Extinguishment of Debt, Amount								760.0
Effect of Fourth Quarter Events, Amount	50.3						36.1
Loss on extinguishment of debt		0	46.5	10.3				36.1
Financial Institutions Fund Revolving Credit Facility		11
Credit Facility Percentage Maximum Per Financial Institution	15.00%	15.00%
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum					4.25%	3.25%					0.50%	4.25%
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum					5.00%	4.00%					0.75%	5.00%
Line of credit facility, letters of credit outstanding	0	0
Line of credit facility, remaining borrowing capacity	210.0	210.0
Line of Credit Facility, Commitment Fee Amount		2.3	2.3	1.4											0.7	0.6	0.1
Equity Interests in Foreign Subsidiaries	66.00%	66.00%
Credit Facility Net Book Value of Collateral of Certain Subsidiaries	700	700
Debt Instrument, Interest Rate During Period								6.50%	1.80%	2.50%			3.70%	3.30%		1.60%	1.80%
Receivables program maximum capacity	105.0	105.0
Receivables facility, letters credit outstanding	23.2	23.2
Receivables facility remaining borrowing capacity	79.6	79.6
Receivables facility maximum borrowing capacity	$ 102.8	$ 102.8
Debt Instrument, Interest Rate, Stated Percentage															1.20%
Accounts Receivable Facility, Renewal Term	364 days	364 days