Retirement Benefit Plans - Net Periodic Benefit Cost (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Recognized net (gain) loss due to settlements						$ 34.0
Other post employment benefit expense excluding settlements curtailment gain						(13.5)
U.S. pension plans [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost		0		0		0.3
Interest cost		16.1		17.5		20.7
Expected return on plan assets		(20.8)		(19.7)		(16.2)
Settlements curtailments and other		0	[1]	0	[1]	3.3	[1]
Amortization of unrecognized prior service (benefit)		(0.7)		(0.7)		(0.5)
Amortization of unrecognized loss		6.5		6.6		7.3
Net periodic benefit cost		1.1		3.7		14.9
Non-U.S. pension plans [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost		9.1		7.4		9.9
Interest cost		17.8		17.6		16.5
Expected return on plan assets		(11.2)		(9.7)		(9.6)
Settlements curtailments and other		(0.1)	[1]	0	[1]	0.6	[1]
Amortization of unrecognized prior service (benefit)		0		0		0
Amortization of unrecognized loss		0.8		0.8		0.8
Net periodic benefit cost		16.4		16.1		18.2
U.S. other postemployment benefit plans [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost		0.7		0.8		0.8
Interest cost		11.8		14.5		18.6
Expected return on plan assets		0		0		0
Settlements curtailments and other		0	[1]	0	[1]	(61.9)	[1]
Amortization of unrecognized prior service (benefit)		(6.9)		(6.9)		(13.2)
Amortization of unrecognized loss		7.9		9.1		7.3
Net periodic benefit cost		13.5		17.5		(48.4)
Other post employment plans amortization of net losses expected in the next year	6.9
Amortization of net prior service cost expected in the next year	(6.4)
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Amortization of net (losses) expected in next year	$ 9.3

[1] In the year ended December 31, 2009, the other post employment benefits settlement/curtailment of $61.9 million, in the table above, was offset by a $34.0 million cost to settle, resulting in a net pre-tax gain of $27.9 million. Excluding the $61.9 million settlement/curtailment gain, the Company's 2009 other post employment benefit expense was $13.5 million.