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Basis of presentation and significant accounting policies and practices - Additional Information (Details) - USD ($)
shares in Millions, $ in Millions
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]      
Antidilutive securities excluded from computation of earnings per share, Amount (in shares) 14 8  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Long-term debt, carrying value $ 14,189   $ 11,223
Level 2      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Long-term debt, estimated fair value $ 13,330