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UNAUDITED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions | 6 Months Ended
--- | ---
Jun. 30, 2021 | Jun. 30, 2020
Operating revenues |  |  |
Contract revenues |  | $ 335 | $ 392
Management contract revenues | [1] | 88 | 178
Total operating revenues |  | 452 | 598
Operating expenses |  |  |
Management contract expenses | [1] | (115) | (208)
Depreciation |  | (83) | (182)
Selling, general and administrative expenses |  | (36) | (37)
Total operating expenses |  | (566) | (748)
Other operating items |  |  |
Loss on impairment of long-lived assets |  | (152) | (1,230)
Gain on sale of assets |  | 11 | 0
Other operating income | [1] | 3 | 8
Total other operating items |  | (138) | (1,222)
Operating loss |  | (252) | (1,372)
Financial and other non-operating items |  |  |
Interest income | [1] | 12 | 20
Interest expense |  | (112) | (200)
Loss on impairment of investments |  | 0 | (47)
Share in results from associated companies (net of tax) |  | 2 | (66)
Gain/(loss) on derivative financial instruments |  | 5 | (1)
Foreign exchange gain/(loss) |  | 9 | (24)
Impairment of convertible bond from related party | [1] | 0 | (29)
Unrealized gain/(loss) on marketable securities |  | 5 | (6)
Other financial items | [1] | (33) | (21)
Reorganization Items |  | (230) | 0
Total financial and other non-operating items, net |  | (342) | (374)
Loss before income taxes |  | (594) | (1,746)
Income tax expense |  | (11) | (2)
Net loss |  | (605) | (1,748)
Net loss attributable to the shareholder |  | (605) | (1,745)
Net loss attributable to the non-controlling interest |  | 0 | (2)
Net loss attributable to the redeemable non-controlling interest |  | $ 0 | $ (1)
Basic loss per share (in dollars per share) |  | $ (6.03) | $ (17.40)
Diluted loss per share (in dollars per share) |  | $ (6.03) | $ (17.40)
Reimbursable revenues/ expenses |  |  |
Operating revenues |  |  |
Revenues |  | $ 17 | $ 19
Operating expenses |  |  |
Expenses |  | (16) | (17)
Other revenues |  |  |
Operating revenues |  |  |
Revenues | [1] | 12 | 9
Vessel and rig |  |  |
Operating expenses |  |  |
Expenses |  | $ (316) | $ (304)
[1] | Includes transactions with related parties. Refer to Note 28 – Related party transactions.

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