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Shareholders' Equity (Details) (USD $) In Millions, except Share data	3 Months Ended		9 Months Ended			1 Months Ended	9 Months Ended		9 Months Ended		9 Months Ended		1 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010	Aug. 31, 2007 Authorized in 2007 [Member]	Sep. 30, 2011 Authorized in 2007 [Member]	Aug. 27, 2007 Authorized in 2007 [Member]	Sep. 30, 2011 Authorized in 2010 [Member]	Dec. 13, 2010 Authorized in 2010 [Member]	Sep. 30, 2011 Authorized in 2011 [Member]	Nov. 03, 2011 Authorized in 2011 [Member]	Nov. 30, 2011 Dividend Declared [Member]
Components of Comprehensive Income (Loss), net of tax [Abstract]
Net earnings	$ 79.6	$ 51.3	$ 188.0	$ 86.8
Other comprehensive income (loss) [Abstract]
Foreign currency translation gain (loss)	(93.6)	112.2	(24.6)	(14.5)
Unrealized gain (loss) on investments	(1.1)	1.7	(0.7)	1.1
Defined benefit pension plans	0.3	0.5	1.4	1.0
Retiree health care plan	0	0	0	(0.1)
Comprehensive income (loss)	(14.8)	165.7	164.1	74.3
Components of Accumulated Other Comprehensive Income (Loss), net of tax [Abstract]
Foreign currency translation gain (loss)	72.0		72.0		96.6
Unrealized gain (loss) on investments	7.3		7.3		8.0
Defined benefit pension plans	(17.7)		(17.7)		(19.1)
Retiree health care plan	1.5		1.5		1.5
Accumulated other comprehensive income (loss)	63.1		63.1		87.0
Share Repurchase Programs [Line Items]
Shares authorized to be repurchased (in shares)								5,000,000		3,000,000		3,000,000
Authorized amount						$ 400.0
Shares repurchased (in shares)			923,200				236,790		686,410		0
Remaining number of shares authorized to be repurchased							0		2,300,000		3,000,000
Dividend declaration date			May 03, 2011
Dividend paid (in dollars per share)			$ 0.40
Subsequent Event [Line Items]
Subsequent event date													Nov. 03, 2011
Amount (dollars per share)													$ 0.40