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Revenue recognition - Narrative (Details)
$ in Millions
3 Months Ended
Sep. 30, 2021
USD ($)
Revenue from Contract with Customer [Abstract]  
Revenue recognized $ 21
Remaining performance obligation, amount $ 6,783
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-10-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation, percentage 85.00%
Remaining performance obligation, period 12 months