Antidilutive Shares (Details) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Antidilutive Securities
Antidilutive Stock Options Excluded Exercise Price Greater Than Average Market Price	3.2	[1]	7.2	[1]
Antidilutive Securities Excluded from Computation of Loss Per Share, Amount	36.2		70.4
Restricted stock, stock options and other equity awards
Antidilutive Securities
Antidilutive Securities Excluded from Computation of Loss Per Share, Amount	5.7		6.3
4.75% Notes
Antidilutive Securities
Antidilutive Securities Excluded from Computation of Loss Per Share, Amount	13.4	[2]	16.5	[2]
4.25% Notes
Antidilutive Securities
Antidilutive Securities Excluded from Computation of Loss Per Share, Amount	0	[2]	30.9	[2]
Preferred stock outstanding
Antidilutive Securities
Antidilutive Securities Excluded from Computation of Loss Per Share, Amount	17.1		16.7

[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 4.75% Notes and 4.25% Notes in March 2013 and March 2012, respectively. See Note 2 for further information on our 4.75% Notes. For purposes of calculating diluted loss per share, the potentially dilutive shares are pro-rated based on the period they were outstanding.