The company posted a loss of A$514.1 million (US$372.4 million) for the 12 months to 30 June, sliding from a profit of A$101.8 million the previous financial year.
Hitting results in the recent financial year was a A$789 million non-cash impairments, A$583 million of which was related to its assets in the South Australian Cooper basin, while it also booked impairments of A$174 million and A$32 million, respectively, against its Egyptian and Romanian assets.
Even