XML 131 R102.htm IDEA: XBRL DOCUMENT v3.20.4
FINANCIAL RISK MANAGEMENT - Sensitivity Analysis For Foreign Currency Risk (Details) - Foreign currency risk - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
GBP      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Impact of 10% decrease on net income (loss) $ (5) $ 10 $ 10
Impact of 10% increase on net income (loss) 5 (10) (10)
Impact of 10% decrease on parent equity (150) 131 103
Impact of 10% increase on parent equity 150 (131) (103)
BRL      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Impact of 10% decrease on net income (loss) (12) 13 14
Impact of 10% increase on net income (loss) 12 (13) (14)
Impact of 10% decrease on parent equity (14) 34 43
Impact of 10% increase on parent equity $ 14 $ (34) $ (43)