Pension Plans and Other Postretirement Benefits (Details4) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Benefit Obligation	$ 2,750.3	$ 2,293.6	$ 2,220.7
Service cost	30.0	30.2	23.3
Interest cost	135.1	131.9	138.6
Benefits paid	(186.9)	(176.9)
Subsidy paid	0	0
Participant contributions	0.7	0.7
Effect of currency rates	0.8	(2.7)
Benefit changes	2.3	0
Net actuarial (gains) losses - discount rate change	216.3	94.3
Net actuarial (gains) losses - other	46.9	(4.6)
Defined Benefit Plan, Business Combinations and Acquisitions, Benefit Obligation	210.7
Defined Benefit Plan, Special Termination Benefits	0.8
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Benefit Obligation	568.6	499.6	509.4
Service cost	3.2	3.1	2.9
Interest cost	27.5	28.9	32.5
Benefits paid	(56.1)	(53.5)
Subsidy paid	1.4	2.1
Participant contributions	0	0
Effect of currency rates	0	0
Benefit changes	3.4	0
Net actuarial (gains) losses - discount rate change	22.2	15.1
Net actuarial (gains) losses - other	34.9	(5.5)
Defined Benefit Plan, Business Combinations and Acquisitions, Benefit Obligation	32.3
Defined Benefit Plan, Special Termination Benefits	$ 0.2