Benefit Plans (Changes in Projected Benefit Obligation, Fair Value of Plan Assets and Funded Status) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Change in Fair Value of Plan Assets [Roll Forward]
Balance	$ 284.7	$ 251.0
Pension Benefits [Member]
Change in Benefit Obligation [Roll Forward]
Balance	(363.2)	(319.9)
Service cost	(9.7)	(8.5)	(8.9)
Interest cost	(14.8)	(15.5)	(16.0)
Participants' contributions	(0.6)	0
Actuarial gain (loss)	12.9	(32.4)
Amendments/transfers in	0	(0.3)
Benefits/expenses paid	16.4	15.3
Foreign currency translation	(1.8)	(1.9)
Balance	(360.8)	(363.2)	(319.9)
Change in Fair Value of Plan Assets [Roll Forward]
Balance	251.0	213.3
Actual return on assets	40.5	32.3
Employer contribution	8.2	19.8
Participants' contributions	0.6	0
Benefits/expenses paid	(16.4)	(15.3)
Foreign currency translation	0.8	0.9
Balance	284.7	251.0	213.3
Funded status at end of year	(76.1)	(112.2)
Other Retirement Benefits [Member]
Change in Benefit Obligation [Roll Forward]
Balance	(26.0)	(21.7)
Service cost	(1.1)	(1.3)	(1.2)
Interest cost	(0.6)	(1.0)	(1.0)
Participants' contributions	(0.5)	(0.5)
Actuarial gain (loss)	18.5	(2.1)
Amendments/transfers in	0	0
Benefits/expenses paid	0.5	0.6
Foreign currency translation	0	0
Balance	(9.2)	(26.0)	(21.7)
Change in Fair Value of Plan Assets [Roll Forward]
Balance	0	0
Actual return on assets	0	0
Employer contribution	0	0.1
Participants' contributions	0.5	0.5
Benefits/expenses paid	(0.5)	(0.6)
Foreign currency translation	0	0
Balance	0	0	0
Funded status at end of year	$ (9.2)	$ (26.0)