Exhibit 12.1

STATEMENT RE: COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

(DOLLARS IN MILLIONS)

	Year Ended December 31,															Three Months Ended March 31,
	2010			2011			2012			2013			2014			2015
Earnings
Income from continuing operations before provision for income taxes	$	521		$	484		$	522		$	346		$	342		$	168
Income from equity investees		(45	)		(49	)		(42	)		(43	)		(48	)		(18	)
Distributed income from equity investees		34			40			32			59			29			3
Interest and amortization of deferred finance costs		646			643			621			613			972			241
Amortization of capitalized interest		2			3			4			4			4			5
Implicit rental interest expense		60			61			66			70			108			29
Total earnings	$	1,218		$	1,182		$	1,203		$	1,049		$	1,407		$	428
Fixed Charges
Interest and amortization of deferred finance costs	$	646		$	643		$	621		$	613		$	972		$	241
Capitalized interest		11			21			24			10			10			4
Implicit rental interest expense		60			61			66			70			108			29
Total fixed charges	$	717		$	725		$	711		$	693		$	1,090		$	274
Ratio of earnings to fixed charges		1.70	x		1.63	x		1.69	x		1.51	x		1.29	x		1.56	x