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Consolidated net (debt)/cash
 12 Months Ended
Dec. 31, 2022
Disclosure Of Consolidated Net Debt [Abstract]  
Consolidated net (debt)/cash
19     Consolidated net (debt)/cash
Financing liabilitiesOther assets
Year ended 31 December 2022
Borrowings
excluding overdrafts(a)
US$m
Lease liabilities(b)
US$m
Net debt related derivatives (note 23)(c)
US$m
Cash and cash equivalents including overdrafts(a)
US$m
Other investments(d)
US$m
Net (debt)/cash
US$m
Analysis of changes in consolidated net (debt)/cash
Opening balance
(12,166)(1,363)(101)12,805 2,401 1,576 
Foreign exchange adjustment
118 69 (92)15 — 110 
Cash movements excluding exchange movements
470 374 (3)(6,046)(352)(5,557)
Other non-cash movements
508 (280)(494)— (51)(317)
Closing balance(11,070)(1,200)(690)6,774 1,998 (4,188)
Year ended 31 December 2021Financing liabilities
Other assets

Borrowings
excluding overdrafts(a)
US$m
Lease liabilities(b)
US$m
Net debt related derivatives
(note 23)(c)
US$m
Cash and cash equivalents including overdrafts(a)
US$m
Other investments(d)
US$m
Net cash/(debt)
US$m
Analysis of changes in consolidated net cash/(debt)
Opening balance
(12,653)(1,178)248 10,381 2,538 (664)
Foreign exchange adjustment
6730(45)100 — 152 
Cash movements excluding exchange movements
270358(51)2,324 (107)2,794 
Other non-cash movements
150(573)(253)— (30)(706)
Closing balance
(12,166)(1,363)(101)12,805 2,401 1,576 
(a)Borrowings excluding overdrafts, of US$11,070 million (2021:US$12,166 million) differs from Borrowings on the balance sheet as it excludes bank overdrafts of US$1 million (2021: US$2 million) which has been included in cash and cash equivalents for the net (debt)/cash reconciliation.
(b)Other non-cash movements in lease liabilities include the net impact of additions, modifications and terminations during the year.
(c)Included within “Net debt related derivatives” are interest rate and cross currency interest rate swaps that are in hedge relationships with the Group's debt.
(d)Other investments includes US$1,998 million (2021: US$2,401 million) of highly liquid financial assets held in managed investment funds classified as held for trading.
The table below summarises, by currency, our net (debt)/cash, after taking into account relevant cross currency interest rate swaps and foreign exchange contracts:
Net (debt)/cash by currencyTotal
borrowings
excluding
overdrafts
US$m		Lease liabilities
US$m		Derivatives
related to net
debt
US$m		Cash and
cash
equivalents
US$m		Other
investments
US$m		Net debt
2022
US$m		Net cash
2021
US$m
US dollar
(10,680)(360)(690)5,803 1,998 (3,929)2,201 
Australian dollar
(225)(429)— 199 — (455)(499)
Canadian dollar(165)(174)— 181 — (158)(320)
South African rand
— (2)— 173 — 171 115 
Other
— (235)— 418 — 183 79 
Total(11,070)(1,200)(690)6,774 1,998 (4,188)1,576