EXHIBIT 12

Computation of Ratio of Earnings to Fixed Charges

The computation of Ratio of Earnings to Fixed Charges as shown on this Exhibit 12 is provided pursuant to Items 503(d) and 601(12) of Regulation S-K.

(in millions)	2015			2014			2013			2012			2011
Income (loss) before income tax benefit (expense)(A)	$	(109	)	$	(565	)	$	(985	)	$	(1,082	)	$	506
Less: Net income attributable to non-controlling interests	(33		)	(40		)	(54		)	(48		)	(55		)
Dividends from non-consolidated affiliates	12			12			13			7			4
Interest expense(B)	270			265			264			213			203
Debt amortization expense	37			49			57			46			44
Interest portion of rent expense(C)	19			20			24			21			18
Total earnings (loss)	$	196		$	(259	)	$	(681	)	$	(843	)	$	720
Capitalized interest	$	1		$	—		$	5		$	9		$	18
Interest expense(B)	289			285			288			234			221
Debt amortization expense	37			49			57			46			44
Total fixed charges	$	327		$	334		$	350		$	289		$	283
Ratio of earnings to fixed charges	0.60			—			—			—			2.54
Earnings shortfall	$	(131	)	$	(593	)	$	(1,031	)	$	(1,132	)	$	—

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(A)    Excludes equity in income (loss) of non-consolidated affiliates.

(B) Excludes interest expense on income tax contingencies.

(C) Represents an estimated amount of rental expense (33%) that is deemed to be representative of the interest factor.

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