Exhibit 12.1

Computation of Ratio of Earnings to Fixed Charges

(Dollars in millions except ratios)	Nine Months Ended September 30, 2016			Year Ended December 31,
				2015			2014			2013			2012			2011
Income (Loss) from continuing operations before income taxes (a)	$	(2,331	)	$	(2,099	)	$	(261	)	$	(207	)	$	(339	)	$	727
Fixed charges:
Interest expense (b)		368			474			507			524			492			462
Capitalized Interest		—			1			5			4			10			10
Interest factor portion of rentals (c)		69			114			132			131			111			81
Total fixed charges		437			589			644			659			613			553
Less: Capitalized Interest		—			(1	)		(5	)		(4	)		(10	)		(10	)
Earnings before income taxes and fixed charges	$	(1,894	)	$	(1,511	)	$	378		$	448		$	264		$	1,270
Ratio of earnings to fixed charges (d)		—			—			—			—			—			2.30

(a) Income from continuing operations before income taxes has been adjusted to include only distributed income of less-than-fifty-percent-owned persons.

(b) Interest expense consists of interest expense incurred from continuing operations and amortization of debt issuance costs.

(c) Interest factor portion of rentals is estimated to be one-third of rental expense.

(d) For the nine months ended September 30, 2016 and for the years ended December 31, 2016, 2015, 2014, 2013 and 2012, earnings, as defined, before fixed charges were inadequate to cover fixed charges by $2.3 billion, $2.1 billion, $266 million, $211 million and $349 million, respectively.