Revenues - Summary of Transaction Price and Allocation of Transaction Price to the Performance Obligations (Details) - USD ($) $ in Millions	Sep. 30, 2025	Jun. 30, 2025
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total allocated transaction price	$ 256	$ 256
License and R&D services
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total allocated transaction price	192
R&D services
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total allocated transaction price	17
Access rights and option continuation periods
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total allocated transaction price	30
Rights to certain studies
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total allocated transaction price	$ 17