XML 165 R93.htm IDEA: XBRL DOCUMENT v3.20.4
Additional disclosure items G.3.2. Tax related risks and uncertain tax position (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Disclosure of other provisions [line items]    
Uncertain tax positions, remote risk 20.00%  
Uncertain tax positions, probable risk 50.00%  
Provision for taxes other than income tax    
Disclosure of other provisions [line items]    
Other provisions $ 77 $ 50
Tax contingent liability    
Disclosure of other provisions [line items]    
Estimated financial effect of contingent liabilities 339 300
Joint ventures | Provision for taxes other than income tax    
Disclosure of other provisions [line items]    
Other provisions 7 4
Joint ventures | Tax contingent liability    
Disclosure of other provisions [line items]    
Estimated financial effect of contingent liabilities $ 69 $ 49
Bottom of range    
Disclosure of other provisions [line items]    
Uncertain tax positions, possible risk 21.00%  
Top of range    
Disclosure of other provisions [line items]    
Uncertain tax positions, possible risk 49.00%