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Commitments and contingencies (Tables)
 12 Months Ended
Dec. 31, 2022
Other Provisions, Contingent Liabilities And Contingent Assets [Abstract]  
Contractual obligation, fiscal year maturity schedule
The following table is a summary of our contractual obligations at December 31, 2022 that are due in each of the next five years and thereafter.
2023 2024 2025 2026 2027 THERE-
AFTER		 TOTAL
Commitments for property, plant and
     equipment and intangible assets		 2,015  1,392  1,052  516  216  949  6,140 
Purchase obligations 602  458  443  560  276  955  3,294 
Leases committed not yet commenced 14  21  16  16  17  96  180 
Total 2,631  1,871  1,511  1,092  509  2,000  9,614