Earnings Per Share (Outstanding Common Stock Equivalents That Were Anti-Dilutive) (Detail) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares	1.5	[1]	2.8	[1]
Warrants [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares	4.7	[2],[3]	15.0	[2],[3]
Shares Underlying 3 1/2% Convertible Notes [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares	4.7	[2]	15.0	[2]

[1] For the three months ended March 31, 2013 and 2012, all outstanding stock options were anti-dilutive, as the Company incurred a net loss; such options had a weighted average exercise price of $2.16 and $3.74, respectively.

[2] The decrease in the number of warrants and the number of shares underlying the 3½% convertible notes that were anti-dilutive was related to the Company’s repurchase of a portion of its 3½% convertible notes and warrants (see Note 11—Long-term Debt and Borrowing Arrangements and Note 14—Stockholders’ Equity for more information).

[3] Represents all outstanding warrants as of March 31, 2013 and 2012, which had an exercise price of $22.50.