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Share-Based Compensation Plans (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Share-Based Compensation Plans [Abstract]
Share-based compensation expense	$ 8.3	$ 8.0	$ 14.8	$ 14.9
Consideration received from share-based awards			$ 15.0	$ 3.9

The total cash inflow associated with the amount received from holders to acquire the entity's shares under incentive and share awards, including stock option exercises. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

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