Benefit Plans (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Service cost	$ 2.6	$ 2.8	$ 5.3	$ 5.7
Interest cost	4.4	4.0	8.7	7.9
Expected return on assets	(4.8)	(4.3)	(9.7)	(8.6)
Amortization of transition obligation			0	0.1
Amortization of prior service credit	(0.3)	(0.3)	(0.6)	(0.7)
Recognized actuarial losses (gains)	0.8	2.3	1.6	4.7
Net periodic benefit cost	2.7	4.5	5.3	9.1
Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Service cost	2.5	2.5	5.1	5.0
Interest cost	4.3	3.7	8.5	7.4
Expected return on assets	(4.8)	(4.3)	(9.7)	(8.6)
Amortization of transition obligation			0	0.1
Amortization of prior service credit	(0.3)	(0.3)	(0.6)	(0.7)
Recognized actuarial losses (gains)	1.1	2.3	2.3	4.7
Net periodic benefit cost	2.8	3.9	5.6	7.9
Other Retirement Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Service cost	0.1	0.3	0.2	0.7
Interest cost	0.1	0.3	0.2	0.5
Expected return on assets	0	0	0	0
Amortization of transition obligation			0	0
Amortization of prior service credit	0	0	0	0
Recognized actuarial losses (gains)	(0.3)	0	(0.7)	0
Net periodic benefit cost	(0.1)	0.6	(0.3)	1.2
U.S. Pension Benefit Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Net periodic benefit cost	2.0	3.1	4.1	6.3
International Pension Benefit Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Net periodic benefit cost	0.8	0.8	1.5	1.6
U.S. Other Retirement Benefit Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Net periodic benefit cost	(0.1)	0.6	(0.3)	1.2
International Other Retirement Benefit Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Net periodic benefit cost	0	0	0	0
U.S. Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Net periodic benefit cost	1.9	3.7	3.8	7.5
International Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Net periodic benefit cost	$ 0.8	$ 0.8	$ 1.5	$ 1.6