Exhibit 12.1

COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

	Year Ended December 31,
	2014			2013			2012			2011			2010
				(U.S. dollars in millions, except ratios)
Earnings
Pre-tax income from continuing operations before adjustments for minority interests in consolidated subsidiaries or income or loss from equity investments		3,638			1,250			1,819			2,956			3,646
Fixed charges, as below		336			340			388			257			235
Interest capitalized, less amortization of capitalized interest		(3	)		(3	)		(7	)		(5	)		—
Total		3,971			1,587			2,200			3,208			3,881
Fixed Charges
Interest costs (expensed and capitalized) and amortization of issuance costs relating to long-term debentures		285			301			344			219			203
Rentals – one-third of rental expenses		51			39			44			38			32
Total		336			340			388			257			235
Ratio of Earnings to Fixed Charges		11.8			4.7			5.7			12.5			16.5