XML 626 R135.htm IDEA: XBRL DOCUMENT v3.22.0.1
Deferred taxation - Recognised and unrecognised amounts in deferred tax assets (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]    
Recognised deferred tax assets $ 3,375 $ 3,385
Unrecognised deferred tax assets 3,649 3,841
FRANCE    
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]    
Recognised deferred tax assets 0 0
Unrecognised deferred tax assets 1,222 1,284
Canada    
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]    
Recognised deferred tax assets 545 617
Unrecognised deferred tax assets 538 574
US    
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]    
Recognised deferred tax assets 851 938
Unrecognised deferred tax assets 67 84
Australia    
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]    
Recognised deferred tax assets 787 649
Unrecognised deferred tax assets 506 528
Mongolia    
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]    
Recognised deferred tax assets 954 974
Unrecognised deferred tax assets 406 540
Other countries    
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]    
Recognised deferred tax assets 238 207
Unrecognised deferred tax assets 910 831
Tax losses | Mongolia    
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]    
Recognised deferred tax assets $ 108 292
Deferred tax loss recovery period 8 years  
Realised or unrealised capital losses    
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]    
Recognised deferred tax assets $ 356 551
Deferred tax loss recovery period 1 year  
Unrecognised deferred tax assets $ 705 $ 720