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Earnings Per Share (Reconciliation Of Net Earnings To Net Earnings Attributable To Common Shares Used In Basic And Diluted Calculation) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Earnings Per Share [Abstract]
Earnings from continuing operations	$ 74.0	$ 51.6	$ 135.2	$ 103.0
Earnings allocated to participating non-vested share awards	(0.5)	(0.4)	(1.0)	(0.8)
Earnings from continuing operations attributable common shares	$ 73.5	$ 51.2	$ 134.2	$ 102.2

This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses and taxes from ongoing operations before extraordinary items, and noncontrolling interest.

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