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Goodwill and intangible assets - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]    
Intangible amortization expense $ 156 $ 87
Estimated amortization expense, year ending June 30, 2024 565  
Estimated amortization expense, year ending June 30, 2025 543  
Estimated amortization expense, year ending June 30, 2026 539  
Estimated amortization expense, year ending June 30, 2027 533  
Estimated amortization expense, year ending June 30, 2028 $ 524