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CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) shares in Millions, $ in Millions | Total controlling interest shareholders' equity | Shares | Additional paid-in capital | Treasury shares, at cost | Retained earnings | Accumulated other comprehensive loss | Noncontrolling interest | Total
--- | --- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2015 | $ 14,690 | $ 5,193 | $ 5,736 | $ (240) | $ 4,278 | $ (277) | $ 310 | $ 15,000
Balance (in shares) at Dec. 31, 2015 |  | 364 |  |  |  |  |  |
Increase (Decrease) in Shareholders' Equity |  |  |  |  |  |  |  |
Share-based compensation | 23 |  | 23 |  |  |  |  | 23
Reduction of par value |  | $ (5,159) | 5,159 |  |  |  |  |
Cancellation of shares held in treasury |  |  | (240) | $ 240 |  |  |  |
Issuance of shares under share-based compensation plans (in shares) |  | 1 |  |  |  |  |  |
Allocated capital for transactions with holders of noncontrolling interest | (7) |  | (7) |  |  |  | 7 |
Net income (loss) attributable to controlling interest |  |  |  |  | 317 |  |  | 317
Other comprehensive loss attributable to controlling interest |  |  |  |  |  | (9) |  | (9)
Total comprehensive income attributable to noncontrolling interest |  |  |  |  |  |  | 7 |
Total comprehensive income (loss) attributable to controlling interest | 308 |  |  |  |  |  |  | 308
Total comprehensive income (loss) |  |  |  |  |  |  |  | 315
Acquisition of noncontrolling interest |  |  |  |  |  |  | (5) | (5)
Distributions to holders of noncontrolling interest |  |  |  |  |  |  | (16) | (16)
Other, net | 3 |  | 3 |  |  |  |  | 3
Balance at Jun. 30, 2016 | 15,017 | $ 34 | 10,674 |  | 4,595 | (286) | 303 | 15,320
Balance (in shares) at Jun. 30, 2016 |  | 365 |  |  |  |  |  |
Balance at Dec. 31, 2016 | 15,802 | $ 36 | 10,993 |  | 5,056 | (283) | 3 | 15,805
Balance (in shares) at Dec. 31, 2016 |  | 389 |  |  |  |  |  |
Increase (Decrease) in Shareholders' Equity |  |  |  |  |  |  |  |
Share-based compensation | 21 |  | 21 |  |  |  |  | 21
Issuance of shares under share-based compensation plans |  | $ 1 | (1) |  |  |  |  |
Issuance of shares under share-based compensation plans (in shares) |  | 2 |  |  |  |  |  |
Net income (loss) attributable to controlling interest |  |  |  |  | (1,599) |  |  | (1,599)
Other comprehensive loss attributable to controlling interest |  |  |  |  |  | (17) |  | (17)
Total comprehensive income attributable to noncontrolling interest |  |  |  |  |  |  | 1 |
Total comprehensive income (loss) attributable to controlling interest | (1,616) |  |  |  |  |  |  | (1,616)
Total comprehensive income (loss) |  |  |  |  |  |  |  | (1,615)
Other, net | (2) |  | (2) |  |  |  |  | (2)
Balance at Jun. 30, 2017 | $ 14,205 | $ 37 | $ 11,011 |  | $ 3,457 | $ (300) | $ 4 | $ 14,209
Balance (in shares) at Jun. 30, 2017 |  | 391 |  |  |  |  |  |

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