XML 41 R33.htm IDEA: XBRL DOCUMENT

Stock-Based Compensation (Details) (USD $) In Millions	3 Months Ended		6 Months Ended		12 Months Ended
Stock-Based Compensation (Details) (USD $) In Millions	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010
Stock-Based Compensation
Stock option expense	$ 6.2	$ 6.0	$ 11.8	$ 10.3
Restricted stock and unit awards expense	16.9	8.6	29.4	12.7
Total stock-based compensation expense	$ 23.1	$ 14.6	$ 41.2	$ 23.0
Stock-Based Compensation (Textuals) [Abstract]
Common shares issued from exercise of stock option outstanding			2.6		1.8

Number of share options (or share units) exercised during the current period.

The noncash expense that accounts for the value of stock or unit options distributed to employees as compensation.