Benefit Plans (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Benefit Plans Disclosure [Line Items]
Service cost	$ 2.4	$ 2.5	$ 7.9	$ 7.3
Interest cost	4.4	4.1	12.8	12.1
Expected return on assets	(4.1)	(4.0)	(12.1)	(11.0)
Amortization of transition obligation			0.1	0.1
Amortization of prior service credit	(0.3)	(0.3)	(1.1)	(0.8)
Recognized actuarial losses	1.7	1.5	4.6	4.2
Curtailment gain, net	(0.2)		(0.2)
Net periodic benefit cost	3.9	3.8	12.0	11.9
Pension Benefits [Member]
Benefit Plans Disclosure [Line Items]
Service cost	2.1	2.1	7.0	6.5
Interest cost	4.1	4.0	12.1	11.5
Expected return on assets	(4.1)	(4.0)	(12.1)	(11.0)
Amortization of transition obligation			0.1	0.1
Amortization of prior service credit	(0.3)	(0.3)	(1.2)	(0.9)
Recognized actuarial losses	1.7	1.6	4.6	4.3
Curtailment gain, net	(0.2)		(0.2)
Net periodic benefit cost	3.3	3.4	10.3	10.5
Other Retirement Benefits [Member]
Benefit Plans Disclosure [Line Items]
Service cost	0.3	0.4	0.9	0.8
Interest cost	0.3	0.1	0.7	0.6
Expected return on assets	0	0	0	0
Amortization of transition obligation			0	0
Amortization of prior service credit	0	0	0.1	0.1
Recognized actuarial losses	0	(0.1)	0	(0.1)
Curtailment gain, net	0		0
Net periodic benefit cost	0.6	0.4	1.7	1.4
International Other Retirement Benefit Plans [Member]
Benefit Plans Disclosure [Line Items]
Net periodic benefit cost	0	0	0	0
U.S. Other Retirement Benefit Plans [Member]
Benefit Plans Disclosure [Line Items]
Net periodic benefit cost	0.6	0.4	1.7	1.4
International Pension Benefit Plans [Member]
Benefit Plans Disclosure [Line Items]
Net periodic benefit cost	0.9	0.8	2.4	1.7
U.S. Pension Benefit Plans [Member]
Benefit Plans Disclosure [Line Items]
Net periodic benefit cost	2.4	2.6	7.9	8.8
U.S. Plans [Member]
Benefit Plans Disclosure [Line Items]
Net periodic benefit cost	3.0	3.0	9.6	10.2
International Plans [Member]
Benefit Plans Disclosure [Line Items]
Net periodic benefit cost	$ 0.9	$ 0.8	$ 2.4	$ 1.7