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RETIREMENT BENEFIT PLANS (Tables)
 12 Months Ended
Dec. 31, 2019
Employee Benefits [Abstract]  
Disclosure of defined benefit plans
US$ MILLIONS
 
2019
 
2018
Plan assets
 
$
686

 
$
287

Less accrued benefit obligation
 
(851
)
 
(368
)
Accrued benefit liability (1)
 
$
(165
)
 
$
(81
)

 
(1)
Presented within ‘Accounts payable and other’ of the consolidated statements of financial position.