Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2012

Stockholders' Equity Note [Abstract]

Common stock reserved for conversion and incentive plans

The following shares of common stock were reserved as of December 31, 2012:

	Shares  (in millions)
Conversion of outstanding preferred stock	0.1
Share-based compensation award plans	6.5
	6.6