Exhibit 12

	Year Ended														Three Months Ended
	December 31 2012		December 31 2013			December 31 2014			December 31 2015			December 31 2016			March 31 2017
Computation of Earnings:
Income before income taxes, minority interests and equity earnings	$	636	$	576		$	516		$	639		$	769		$	179
Adjustments to income:
Add: Distributed income from less than 50% owned companies		1		1			—			—			—			—
Add: Fixed charges as presented below		256		262			275			290			270			66
Subtract: Interest capitalized		9		(5	)		(1	)		(2	)		(9	)		(2	)
Add: Amortization of interest previously capitalized		—		1			1			2			3			1
Earnings	$	902	$	835		$	791		$	929		$	1,033		$	244
Computation of Fixed Charges:
Interest incurred	$	214	$	226		$	239		$	253		$	227		$	57
Interest capitalized		9		5			1			2			9			2
Amortization of debt related costs		12		10			14			17			16			3
Portion of rental expense representative of interest (1)		21		21			21			18			18			4
Total fixed charges	$	256	$	262		$	275		$	290		$	270		$	66
Ratio of earnings to fixed charges		3.5		3.2			2.9			3.2			3.8			3.7

(1) One-third of net rent expense is the portion deemed representative of the interest factor.