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Goodwill and intangible assets - Expected Intangible Asset Amortization Expense (Details)
$ in Millions
Mar. 31, 2023
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
For year ended December 31, 2023 $ 3
For year ended December 31, 2024 3
For year ended December 31, 2025 1
For year ended December 31, 2026 1
Thereafter 3
Total remaining amortization of intangible assets $ 11