The accruals balance includes $875 million (2019: $1,147 million) relating to property, plant and equipment and intangible assets under construction, based on an assessment of the estimated cost to complete and percentage of completion of assets at the reporting date.

Recognition and measurement

Trade and other payables represent liabilities for goods and services provided to the Group prior to the end of the reporting date and which are unpaid. The amounts are unsecured. Trade and other payables are initially recognised at their fair value and subsequently carried at amortised cost using the effective interest method.