Share Repurchases (Tables)

12 Months Ended

Dec. 31, 2011

Comprehensive (Loss) Income/Share Repurchases [Abstract]

Summarize details of share repurchase activity

	Related to Share-Based Payments		2008 Plan		Total Share Repurchase Activity
2011 share repurchase activity:
Number of shares		0.1		3.2		3.3
Weighted average price per share	$	39.26	$	37.11	$	37.16
Amount Repurchased	$	3.3	$	119.7	$	123.0
2010 share repurchase activity:
Number of shares		0.2		3.3		3.5
Weighted average price per share	$	44.83	$	43.97	$	44.02
Amount repurchased	$	9.4	$	144.3	$	153.7
2009 share repurchase activity:
Number of shares		0.2		—		0.2
Weighted average price per share	$	30.55	$	—	$	30.55
Amount repurchased	$	5.6	$	—	$	5.6