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Shareholders' Equity (Details) (USD $) In Millions, except Share data	3 Months Ended		6 Months Ended			1 Months Ended	6 Months Ended		6 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010	Aug. 31, 2007 Authorized in 2007 [Member]	Jun. 30, 2011 Authorized in 2007 [Member]	Aug. 27, 2007 Authorized in 2007 [Member]	Jun. 30, 2011 Authorized in 2010 [Member]	Dec. 13, 2010 Authorized in 2010 [Member]	Jun. 30, 2011 Dividend Declared [Member]
Components of Comprehensive Income (Loss), net of tax [Abstract]
Net earnings	$ 72.7	$ 32.7	$ 108.4	$ 35.5
Other comprehensive income (loss) [Abstract]
Foreign currency translation gain (loss)	19.7	(62.6)	69.0	(126.7)
Unrealized gain (loss) on investments	(0.4)	(1.7)	0.4	(0.6)
Defined benefit pension plans	0.4	0.5	1.1	0.5
Retiree health care plan	0	(0.1)	0	(0.1)
Comprehensive income (loss)	92.4	(31.2)	178.9	(91.4)
Components of Accumulated Other Comprehensive Income (Loss), net of tax [Abstract]
Foreign currency translation gain (loss)	165.6		165.6		96.6
Unrealized gain (loss) on investments	8.4		8.4		8.0
Defined benefit pension plans	(18.0)		(18.0)		(19.1)
Retiree health care plan	1.5		1.5		1.5
Accumulated other comprehensive income (loss)	157.5		157.5		87.0
Share Repurchase Programs [Line Items]
Shares authorized to be repurchased (in shares)								5,000,000		3,000,000
Authorized amount						$ 400.0
Shares repurchased (in shares)			305,600				236,790		68,810
Remaining number of shares authorized to be repurchased							0		2,900,000
Subsequent Event [Line Items]
Subsequent event date											May 03, 2011
Amount (dollars per share)											$ 0.40