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Consolidated Statements of Comprehensive Income - USD ($) $ in Millions | 6 Months Ended
--- | ---
Jun. 30, 2018 | Jun. 30, 2017
Statement of Comprehensive Income [Abstract] |  |
Net loss | $ (635) | $ (101)
Other comprehensive income/(loss), net of tax: |  |
Unrealized gain on marketable securities |  | 6
Change in fair value of debt component of Archer convertible bond | 2 |
Actuarial gain relating to pension | 1 | 1
Unrealized gain on interest rate swaps in VIEs and subsidiaries |  | 1
Share of other comprehensive loss from associated companies | 11 | (14)
Other comprehensive income (loss): | 14 | (6)
Total comprehensive loss for the period | (621) | (107)
Comprehensive loss attributable to the parent | (463) | (84)
Comprehensive loss attributable to the non-controlling interest | (160) | $ (23)
Comprehensive loss attributable to the redeemable non-controlling interest | $ 2 |

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