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Lease liability and Right-of-use assets (Details 2) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Disclosure of maturity analysis of total lease liabilities [line items]    
Lease liabilities $ 1,789 $ 1,896
Lease liabilities undiscounted 3,205 3,349
Less current lease liabilities (251) (275)
Less current lease liabilities undiscounted (297) (324)
Non-current lease liabilities 1,538 1,621
Non-current lease liabilities undiscounted 2,908 3,025
Commitments for leases not yet commenced 83 134
Most material lease with lease term extension $ 700 $ 600
Lease term end date 2071 2071
Not later than one year [member]    
Disclosure of maturity analysis of total lease liabilities [line items]    
Lease liabilities $ 251 $ 275
Lease liabilities undiscounted 297 324
Later than one year and not later than two years [member]    
Disclosure of maturity analysis of total lease liabilities [line items]    
Lease liabilities 190 216
Lease liabilities undiscounted 232 258
Later than two years and not later than three years [member]    
Disclosure of maturity analysis of total lease liabilities [line items]    
Lease liabilities 167 162
Lease liabilities undiscounted 201 198
Later than three years and not later than four years [member]    
Disclosure of maturity analysis of total lease liabilities [line items]    
Lease liabilities 137 139
Lease liabilities undiscounted 172 172
Later than four years and not later than five years [member]    
Disclosure of maturity analysis of total lease liabilities [line items]    
Lease liabilities 122 122
Lease liabilities undiscounted 154 154
Later than five years [member]    
Disclosure of maturity analysis of total lease liabilities [line items]    
Lease liabilities 922 982
Lease liabilities undiscounted $ 2,149 $ 2,243