v3.19.2
Summary of Changes in Accumulated Other Comprehensive Income (Loss) by Component (Parenthetical) (Detail) - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Derivatives      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Unrealized gains (losses), tax $ 2 $ 11 $ 4
Net change related to other comprehensive income (loss), tax (6) 5 (5)
Investments      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Unrealized gains (losses), tax 616 (427) 267
Net change related to other comprehensive income (loss), tax 635 (1,165) (613)
Translation adjustments and other      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Net change related to other comprehensive income (loss), tax $ (1) $ 0 $ 9