Exhibit 12.1

Statement Regarding

Computation of Ratios of Earnings to

Fixed Charges and Preferred Stock Dividends

|  | Year Ended December 31, |
(US$ in millions except ratios) |  | 2015 |  | 2014 |  | 2013 |  | 2012 |  | 2011 |
Earnings (1) |  |  |  |  |  |  |  |  |  |  |
Pre-tax income before noncontrolling interests and income (loss) from discontinued operations, net of tax |  | $ | 1,051 |  | $ | 734 |  | $ | 1,014 |  | $ | 372 |  | $ | 1,020 |
plus: Fixed charges |  | 386 |  | 491 |  | 516 |  | 404 |  | 429 |
Amortization of capitalized interest |  | 22 |  | 22 |  | 21 |  | 21 |  | 19 |
Distributed income of equity investees |  | 8 |  | 3 |  | 2 |  | 1 |  | 6 |
less: Capitalized interest |  | (7 | ) | (6 | ) | (4 | ) | (13 | ) | (16 | )
Preferred stock dividends and other obligations |  | (53 | ) | (48 | ) | (76 | ) | (34 | ) | (34 | )
Earnings: |  | $ | 1,407 |  | $ | 1,196 |  | $ | 1,473 |  | $ | 751 |  | $ | 1,424 |
Fixed charges (1) |  |  |  |  |  |  |  |  |  |  |
Capitalized interest |  | $ | 7 |  | $ | 6 |  | $ | 4 |  | $ | 13 |  | $ | 16 |
Expensed interest |  | 258 |  | 347 |  | 363 |  | 294 |  | 295 |
plus: Amortized premiums, discounts and capitalized debt expenditures |  | 10 |  | 12 |  | 13 |  | 12 |  | 23 |
Estimate of interest within rental expense |  | 58 |  | 78 |  | 60 |  | 51 |  | 61 |
Preferred stock dividends and other obligations |  | 53 |  | 48 |  | 76 |  | 34 |  | 34 |
Fixed charges: |  | $ | 386 |  | $ | 491 |  | $ | 516 |  | $ | 404 |  | $ | 429 |
Ratio of Earnings/Fixed charges |  | 3.6 |  | 2.44 |  | 2.86 |  | 1.86 |  | 3.32 |

(1) For the purpose of determining the Ratio of Earnings to Fixed Charges and Preferred Stock Dividends, earnings are defined as pretax income before noncontrolling interests and income (loss) from discontinued operations, net of tax in consolidated subsidiaries plus fixed charges and amortization of capitalized interest less capitalized interest and preferred stock dividend and other obligations requirements. Fixed charges consist of interest expense (capitalized and expensed), amortization of deferred debt issuance costs, portion of rental expense that is representative of the interest factor and preferred stock dividend and other obligations requirements of the registrant and consolidated subsidiaries.

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