Exhibit 12

COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

(In millions, except ratios)

	Year Ended December 31,
	2010			2011			2012			2013			2014
Earnings:
Income (loss) from continuing operations before provision (benefit) for income taxes	$	(63	)	$	164		$	88		$	605		$	850
Add:
Fixed charges, net of capitalized interest	279			271			504			521			520
Total earnings available for fixed charges	216			435			592			1,126			1,370
Fixed charges (1):
Interest expense, net	255			228			512			475			555
Add back interest income, which is netted in interest expense	1			1			2			1			2
Add back refinance charges/gains (losses) on bond repurchases/retirement of subordinated convertible debentures, included in interest expense	(28		)	(5		)	(72		)	(3		)	(80		)
Interest expense—subordinated convertible debentures	8			7			4			3			—
Capitalized interest	—			—			—			—			—
Interest component of rent expense	43			40			58			45			43
Fixed charges	$	279		$	271		$	504		$	521		$	520
Ratio of earnings to fixed charges	—  (2)			1.6x			1.2x			2.2x			2.6x

_________________

(1) Fixed charges consist of interest expense, which includes amortization of deferred finance charges, interest expense-subordinated debentures, capitalized interest and imputed interest on our lease obligations. The interest component of rent was determined based on an estimate of a reasonable interest factor at the inception of the leases.

(2) The ratio coverage was less than 1:1 for the year ended December 31, 2010 due to our loss for the year. We would have had to have generated additional earnings of $63 for the year ended December 31, 2010 to have achieved a coverage ratio of 1:1.