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Related-party transactions (Tables)
 12 Months Ended
Dec. 31, 2019
Related party transactions [abstract]  
Summary of transactions and balances with equity accounted units


Note
2019
US$m

2018
US$m

2017
US$m

Income statement items
 
 
 
 
Purchases from equity accounted units
 
(1,155
)
(1,209
)
(993
)
Sales to equity accounted units
 
268

493

210


 
 
 
 
Cash flow statement items
 
 
 
 
Dividends from equity accounted units
 
669

800

817

Net funding of equity accounted units
 
(33
)
(9
)
(3
)

 
 
 
 
Balance sheet items
 
 
 
 
Investments in equity accounted units (a)
15
3,971

4,299

4,486

Loans to equity accounted units
20
39

38

39

Loans from equity accounted units
22
—

—

(31
)
Trade and other receivables: amounts due from equity accounted units(b)
18
259

278

299

Trade and other payables: amounts due to equity accounted units
25
(271
)
(223
)
(175
)

(a)
Investments in equity accounted units include quasi equity loans. Further information about investments in equity accounted units is set out in notes 35 and 36.
(b)
This includes prepayments of tolling charges.