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Summary of Changes in Accumulated Other Comprehensive Income (Loss) by Component (Parenthetical) (Detail) - USD ($) $ in Millions | 12 Months Ended
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Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2019
Derivatives |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Unrealized gains (losses), tax | $ 9 | $ (10) | $ 2
Net change related to other comprehensive income (loss), tax | 7 | (10) | (6)
Investments |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Unrealized gains (losses), tax | (589) | 1,057 | 616
Net change related to other comprehensive income (loss), tax | (602) | 1,058 | 635
Translation adjustments and other |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Net change related to other comprehensive income (loss), tax | $ (9) | $ 1 | $ (1)

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