Revenue recognition - Narrative (Details) $ in Millions	6 Months Ended
	Dec. 31, 2025 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue recognized	$ 93
Remaining performance obligation, amount	$ 11,700
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation (as percent)	70.00%
Remaining performance obligation, period (in months)	12 months