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SHAREHOLDERS' EQUITY | 12 Months Ended
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Dec. 31, 2016
Stockholders' Equity Note [Abstract] |
SHAREHOLDERS' EQUITY |
a) | Common Shares
At December 31, 2016, and 2015, our authorized share capital was 800,000,000 common shares, par value of $0.0125 per share. The following table presents our common shares issued and outstanding, excluding restricted shares under our share-based compensation plans (refer to Note 16 'Share-based Compensation'):
| Year ended December 31, | 2016 |  | 2015 |  | 2014 |
| Shares issued, balance at beginning of year | 176,240 |  |  | 175,478 |  |  | 174,134 |  |
| Shares issued | 340 |  |  | 762 |  |  | 1,344 |  |
| Total shares issued at end of year | 176,580 |  |  | 176,240 |  |  | 175,478 |  |
| Treasury shares, balance at beginning of year | (80,174 | ) |  | (76,052 | ) |  | (64,649 | ) |
| Shares repurchased | (10,508 | ) |  | (4,616 | ) |  | (11,752 | ) |
| Shares reissued from treasury | 543 |  |  | 494 |  |  | 349 |  |
| Total treasury shares at end of year | (90,139 | ) |  | (80,174 | ) |  | (76,052 | ) |
| Total shares outstanding | 86,441 |  |  | 96,066 |  |  | 99,426 |  |
During 2016, the total cash dividends declared per common share were $1.43 (2015: $1.22; 2014: $1.10). Treasury shares On December 9, 2016, our Board of Directors authorized a new share repurchase plan for up to $1 billion of our common shares through December 31, 2017. The new plan is effective January 1, 2017. The following table presents our common share repurchase activities, which are held in treasury:
| Year ended December 31, | 2016 |  | 2015 |  | 2014 |
| In the open market: |  |  |  |  |  |
| Total shares(1) | 10,241 |  |  | 4,264 |  |  | 11,317 |  |
| Total cost | $ | 557,476 |  |  | $ | 246,490 |  |  | $ | 524,168 |  |
| Average price per share(2) | $ | 54.44 |  |  | $ | 57.80 |  |  | $ | 46.32 |  |
| From employees:(3) |  |  |  |  |  |
| Total shares | 267 |  |  | 352 |  |  | 435 |  |
| Total cost | $ | 14,329 |  |  | $ | 18,048 |  |  | $ | 19,034 |  |
| Average price per share(2) | $ | 53.74 |  |  | $ | 51.34 |  |  | $ | 43.82 |  |
| Total |  |  |  |  |  |
| Total shares | 10,508 |  |  | 4,616 |  |  | 11,752 |  |
| Total cost | $ | 571,805 |  |  | $ | 264,538 |  |  | $ | 543,202 |  |
| Average price per share(2) | $ | 54.42 |  |  | $ | 57.32 |  |  | $ | 46.22 |  |
(1) | Amounts in 2016 and 2015 include 1,358,380 and 4,149,378, respectively, of common shares acquired under the accelerated share repurchase program (see below for more detail).
(2) | Calculated using whole numbers.
(3) | To satisfy withholding tax liabilities upon vesting of restricted stock, restricted stock units, and exercise of stock options. Share repurchases from employees are excluded from the authorized share repurchase plans noted above.
Accelerated Share Repurchase Program On August 17, 2015, the Company entered into an ASR agreement with Goldman, Sachs & Co. (“Goldman Sachs”) to repurchase an aggregate of $300 million of the Company's ordinary shares under an accelerated share repurchase program. During August 2015, under the terms of this agreement, the Company paid $300 million to Goldman Sachs and initially repurchased 4,149,378 common shares. The initial shares acquired represented 80% of the $300 million total paid to Goldman Sachs and were calculated using the Company’s stock price at activation of the program. The ASR program is accounted for as an equity transaction. Accordingly, as at December 31, 2015, $240 million of common shares repurchased were included as treasury shares in the Consolidated Balance Sheets with the remaining $60 million included as a reduction to additional paid-in capital. On January 15, 2016, Goldman Sachs early terminated the ASR agreement and delivered 1,358,380 additional common shares to the Company, resulting in the reduction from additional paid-in capital of $60 million being reclassified to treasury shares. In total, the Company repurchased 5,507,758 common shares under the ASR agreement at an average price of $54.47.
b) | Preferred Shares
Series B Preferred Shares During November 2005, we issued $250 million of 7.50% Series B preferred shares, par value $0.0125 per share, with a liquidation preference of $100.00 per share. We may redeem the shares on or after December 1, 2015 at a redemption price of $100.00 per share. Dividends on the Series B preferred shares are non-cumulative. Holders of Series B preferred shares will be entitled to receive, only when, as and if declared by our board of directors, non-cumulative cash dividends, from the original issue date, quarterly in arrears on the first day of March, June, September and December of each year, commencing on March 1, 2006, up to but not including January 27, 2016. To the extent declared, these dividends will accumulate, with respect to each dividend period, in an amount per share equal to 7.50% of the liquidation preference per annum. During April 2012, we closed a cash tender offer for any and all of our outstanding 7.50% Series B preferred shares at a purchase price of $102.81 per share. As a result, we purchased 2,471,570 Series B preferred shares for $254 million. In connection with this tender offer, we recognized a $9 million loss on redemption (calculated as the difference between the redemption price and the carrying value), which was recognized as a reduction in determining our net income available to common shareholders. In 2015, total dividends declared on Series B preferred shares were $6.8125 per share, and dividends paid were $7.50 per share. In 2014, total dividends declared and paid on Series B preferred shares were $7.50 per share. On January 27, 2016 we redeemed the remaining 28,430 Series B preferred shares, for an aggregate redemption price of $3 million. Series C Preferred Shares During March 2012, we issued $400 million of 6.875% Series C preferred shares, par value $0.0125 per share, with a liquidation preference of $25.00 per share. We may redeem the Series C preferred shares on or after April 15, 2017 at a redemption price of $25.00 per share. Dividends on the Series C preferred shares are non-cumulative. Holders of the Series C preferred shares will be entitled to receive, only when, as and if declared by the board of directors, non-cumulative cash dividends, from the original issue date, quarterly in arrears on the fifteenth day of January, April, July and October of each year, commencing on July 15, 2012. To the extent declared, these dividends will accumulate, with respect to each dividend period, in an amount per share equal to 6.875% of the liquidation preference per annum. During October and November 2016, we repurchased 1,957,045 Series C preferred shares at an average purchase price of $25.67 per share for $50 million. In connection with the repurchase of these shares, we recognized a $1 million loss on redemption (calculated as the difference between the redemption price and the carrying value), which was recognized as a reduction in determining our net income available to common shareholders. At December 31, 2016, 14,042,955 Series C preferred shares, representing $351 million in aggregate liquidation preference, remain outstanding. For 2016, 2015 and 2014, the total dividends declared and paid on Series C preferred shares were $1.7188 per share in each year. Series D Preferred Shares During May 2013, we issued $225 million of 5.50% Series D preferred shares, par value $0.0125 per share, with a liquidation preference of $25.00 per share. We may redeem the Series D preferred shares on or after June 1, 2018 at a redemption price of $25.00 per share. Dividends on the Series D preferred shares are non-cumulative. Holders of the Series D preferred shares will be entitled to receive, only when, as and if declared by the Board of Directors, non-cumulative cash dividends from the original issue date, quarterly in arrears on the first day of March, June, September and December of each year, commencing on September 1, 2013. To the extent declared, these dividends will accumulate, with respect to each dividend period, in an amount per share equal to 5.50% of the liquidation preference per annum. In 2016, 2015 and 2014, total dividends declared and paid on Series D preferred shares were $1.3750 per share. Series E Preferred Shares During November 2016, we issued $550 million of 5.50% Series E preferred shares, par value $0.0125 per share, with a liquidation preference of $2,500 per share. We may redeem the Series E preferred shares on or after November 7, 2021 at a redemption price of $2,500 per share. Dividends on the Series E preferred shares are non-cumulative. Holders of the Series E preferred shares will be entitled to receive, only when, as and if declared by the Board of Directors, non-cumulative cash dividends from the original issue date, quarterly in arrears on the fifteenth day of January, April, July and October of each year, commencing on January 17, 2017. To the extent declared, these dividends will accumulate, with respect to each dividend period, in an amount per Series E preferred share equal to 5.50% of the liquidation preference per annum. In 2016, total dividends declared on Series E preferred shares were $34.3750 per share, which were subsequently paid in January 2017.

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