Fair Value (Financial Instruments Carried At Fair Value On A Recurring Basis) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011		Dec. 31, 2010
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives	$ 12.6	[1]	$ 2.0	[1]
Total	12.6		2.0
Derivatives	6.8	[1]	12.9	[1]
Contingent consideration arising from acquisitions	9.1		2.1	[2]
Total	15.9		15.0
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives		[1]		[1]
Total
Derivatives		[1]		[1]
Contingent consideration arising from acquisitions				[2]
Total
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives	12.6	[1]	2.0	[1]
Total	12.6		2.0
Derivatives	6.8	[1]	12.9	[1]
Total	6.8		12.9
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration arising from acquisitions	9.1		2.1	[2]
Total	$ 9.1		$ 2.1

[1] Represents interest rate swaps and FX forwards as more fully described in Note 5 to the financial statements

[2] Represents contingent consideration liabilities pursuant to the agreements for certain MA acquisitions which are more fully discussed in Note 7 to the consolidated financial statements