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FINANCIAL LIABILTIES (Tables)
12 Months Ended
Dec. 31, 2020
Financial Instruments [Abstract]  
Disclosure of financial liabilities
As of
US$ MILLIONSDec. 31, 2020Dec. 31, 2019
Current:
Inflation swaps$23 $
Total current financial liabilities$23 $
Non-current:
Inflation swaps$46 $71 
Deferred consideration(a)962 931 
Total non-current financial liabilities$1,008 $1,002 
The following table provides a continuity schedule of outstanding exchangeable shares and class B shares along with our corresponding liability and remeasurement gains and losses.
Exchangeable shares outstanding
(Shares)
Class B shares outstanding
(Shares)
BIP unit price
(US$)
Exchangeable and class B shares
(US$ Millions)
Balance at January 1, 2020  $ $ 
Share issuance46,349,323 1 38.09 1,765 
Share exchanges(1)
(1,388,874) 39.60 (55)
Remeasurement of liability   511 
Balance at December 31, 202044,960,449 1 $49.40 $2,221 
(1)The unit price reflected here represents the weighted average price of the units exchanged during the period and is calculated based on the NYSE closing price per unit on the date of exchange.