Stockholders' Equity (Details 1) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012
Estimated amount of share-based compensation expense
2012	$ 12.2
2013	13.1
2014	6.6
2015	0.5
Total	32.4
2012 Three-year PSU Awards [Member]
Estimated amount of share-based compensation expense
2012	1.4
2013	2.8
2014	2.8
Total	7.0
2011 Three-year PSU Awards [Member]
Estimated amount of share-based compensation expense
2012	1.2
2013	2.4
Total	3.6
2010 Three-year PSU Awards [Member]
Estimated amount of share-based compensation expense
2012	1.7
Total	1.7
2012 CEO Incentive Compensation [Member]
Estimated amount of share-based compensation expense
2012	2.3
Total	2.3
SLO Awards [Member]
Estimated amount of share-based compensation expense
2012	0.4
2013	0.2
Total	0.6
Other long-term share-based incentive compensation programs [Member]
Estimated amount of share-based compensation expense
2012	5.2
2013	7.7
2014	3.8
2015	0.5
Total	$ 17.2