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Fair Value Measurements - Changes in Level 3 Liabilities (Details) - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2019
Fair Value Disclosures [Abstract]      
Fair value at the beginning of the year $ 15 $ 14 $ 15
Changes in fair value of Level 3 liabilities 2 1 0
Payments 0 0 (1)
Foreign currency translation 1 0 0
Fair value at the end of the year $ 18 $ 15 $ 14