Antidilutive Shares (Details) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012		Mar. 31, 2011
Antidilutive Securities
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	70.4		77.8
Antidilutive Stock Options, Exercise Price Greater Than Average Market Price	7.2	[1]	8.1	[1]
Restricted stock, stock options and other equity awards
Antidilutive Securities
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	6.3		13.3
4.75% Notes
Antidilutive Securities
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	16.5		16.1
4.25% Notes
Antidilutive Securities
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	30.9	[2]	32.2
Preferred stock outstanding
Antidilutive Securities
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	16.7		16.2

[1] These options are outstanding at the end of the respective periods. In any period in which the exercise price is less than the average market price, these options have the potential to be dilutive, and application of the treasury stock method would reduce this amount.

[2] We retired all of our outstanding 4.25% Notes in March 2012. For purposes of calculating diluted loss per share, the potentially dilutive shares are pro-rated based on the period they were outstanding.