General (Details) (USD $) In Millions, except Per Share data	3 Months Ended	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Comprehensive Income
Net income attributable to common shareholders	$ 52.7	$ 70.6	$ 98.0	$ 140.4
Other comprehensive (loss) income:
Translation gains (losses)	18.1	(44.8)	44.6	(60.6)
Unrealized gains (loss) on securities, net of tax	(0.1)	(1.1)	(9.2)	(0.7)
Reclassification for (gains) losses included in net income, net of tax		(0.6)		(0.6)
Total other comprehensive (loss) income	18.0	(46.5)	35.4	(61.9)
Total comprehensive income	70.7	24.1	133.4	78.5
EPS - basic
Net income attributable to common shareholders	52.7	70.6	98.0	140.4
Basic weighted average common shares outstanding	124.5	122.3	124.1	122.0
EPS - basic	$ 0.42	$ 0.58	$ 0.79	$ 1.15
EPS - diluted
Net income attributable to common shareholders	$ 52.7	$ 70.6	$ 98.0	$ 140.4
Basic weighted average common shares outstanding	124.5	122.3	124.1	122.0
Effect of dilutive securities:
Dilutive stock awards	1.9	1.7	2.0	1.7
Diluted weighted average common shares outstanding	126.4	124.0	126.1	123.7
EPS - diluted	$ 0.42	$ 0.57	$ 0.78	$ 1.14

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the economic entity, including both controlling (parent) and noncontrolling interests. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, including any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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