Past losses
In 2008 it was a 'mark to market' loss of 8billion. The majority of that loss was for future years. So if the fuel price had stayed the same from that point on (31/12/08) then yes CX would have lost a cumulative $8 billion but because of Accounting standards that stood at the time, the loss was 'recognised' in the 2008 accounts.
In actual fact we lost $309 MILLION in realised hedge losses in 2008. Not $8 Billion.
In 2009 we made a hedging GAIN of $740million and an unrealised hedging gain of over $2billion.
So the point of difference is here is this....
2008 $309million loss for the group
2009 $740million gain for the group
2017 $6,450million loss!