XML 630 R150.htm IDEA: XBRL DOCUMENT v3.20.4
Deferred Taxation - Recognised and unrecognised amounts in deferred tax assets (Detail) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]    
Deferred tax assets $ 3,385 $ 3,102
Unrecognised 3,841 3,162
France    
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]    
Deferred tax assets 0 0
Unrecognised 1,284 1,111
Canada    
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]    
Deferred tax assets 617 492
Unrecognised 574 566
United States of America    
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]    
Deferred tax assets 938 920
Unrecognised 84 51
Australia    
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]    
Deferred tax assets 649 698
Unrecognised 528 316
Mongolia    
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]    
Deferred tax assets 974 704
Unrecognised 540 721
Other countries    
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]    
Deferred tax assets 207 288
Unrecognised $ 831 $ 397