Accounts receivable	6 Months Ended
Accounts receivable	Jun. 30, 2019
Accounts Receivable, Net, Current [Abstract]
Accounts receivable	Accounts receivable Accounts receivable are held at their nominal amount less an allowance for doubtful amounts. Doubtful amounts are recognized when it is unlikely that required payments of specific amounts will occur as a result of the financial condition of the customer. As at June 30, 2019 (Successor) we had no allowances for doubtful accounts netted against our accounts receivable (December 31, 2018 (Successor): nil). We recognized no bad debt expense for the three and six months ended June 30, 2019 (Successor) (three and six months ended June 30, 2018 (Predecessor): $48 million).

The entire disclosure for claims held for amounts due a entity, excluding financing receivables. Examples include, but are not limited to, trade accounts receivables, notes receivables, loans receivables. Includes disclosure for allowance for credit losses.