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Goodwill and other intangible assets - Narrative (Details) - USD ($)
$ in Billions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]      
Amortization charges associated with finite-lived intangible assets $ 2.6 $ 2.6 $ 2.8
Total estimated amortization of finite-lived intangible assets for 2023 2.8    
Total estimated amortization of finite-lived intangible assets for 2024 2.7    
Total estimated amortization of finite-lived intangible assets for 2025 2.5    
Total estimated amortization of finite-lived intangible assets for 2026 2.1    
Total estimated amortization of finite-lived intangible assets for 2027 $ 2.1