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Trade and Other Receivables - Summary of Trade and Other Receivables (Detail) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Current      
Trade receivables $ 3,586 $ 3,209  
Construction contract assets [1] 565 499  
Total trade receivables and construction contract assets, gross 4,151 3,708 $ 3,709
Loss allowance (131) (140)  
Total trade receivables and construction contract assets, net 4,020 3,568  
Amounts receivable from equity accounted investments 31 32  
Prepayments 251 221  
Other receivables 267 265  
Total 4,569 4,086  
Non-current      
Other receivables $ 239 $ 325  
[1] Includes unbilled revenue and retentions held by customers in respect of construction contracts at the balance sheet date amounting to $361 million and $204 million respectively (2020: $297 million and $202 million respectively). The movements in these balances during the year was as follows: