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Summary of significant accounting policies - Reclassifications out of Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Mar. 31, 2023
Jun. 30, 2022
Mar. 31, 2022
Jun. 30, 2023
Jun. 30, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]            
Cost of net revenues, interest expense and foreign currency losses $ 1,695   $ 1,313   $ 3,196 $ 2,488
Income tax expense 210   39   332 85
Net income $ 262 $ 201 $ 123 $ 65 463 188
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive loss            
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]            
Net income         (1) (7)
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive loss | Unrealized (Loss) Gains on hedging activities, net            
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]            
Cost of net revenues, interest expense and foreign currency losses         (2) (9)
Income tax expense         $ 1 $ 2