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Summary of Changes in Accumulated Other Comprehensive Income (Loss) by Component (Detail) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Sep. 30, 2020 | Sep. 30, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Balance, beginning of period | $ 118,304 |
Accounting Standards Update [Extensible List] | us-gaap:AccountingStandardsUpdate201601Member | us-gaap:AccountingStandardsUpdate201601Member
Net change related to other comprehensive income (loss) | $ (86) | $ 279
Balance, end of period | 123,392 | 106,061
Derivatives |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Balance, beginning of period | (38) | 0
Unrealized gains (losses), net of tax | 20 | (6)
Tax expense (benefit) included in provision for income taxes | 4 | (1)
Amounts reclassified from accumulated other comprehensive income (loss) | (16) | 4
Net change related to other comprehensive income (loss) | 4 | (2)
Balance, end of period | (34) | (2)
Derivatives | Revenue |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Reclassification adjustments for (gains) losses | (20) | 5
Investments |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Balance, beginning of period | 5,478 | 1,488
Unrealized gains (losses), net of tax | (188) | 576
Tax expense (benefit) included in provision for income taxes | 4 | 0
Amounts reclassified from accumulated other comprehensive income (loss) | (13) | 1
Net change related to other comprehensive income (loss) | (201) | 577
Balance, end of period | 5,287 | 2,065
Investments | Cumulative effect of accounting changes |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Balance, end of period | 10 | 0
Investments | Other Income (Expense), Net |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Reclassification adjustments for (gains) losses | (17) | 1
Translation adjustments and other |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Balance, beginning of period | (2,254) | (1,828)
Net change related to other comprehensive income (loss) | 111 | (296)
Balance, end of period | (2,143) | (2,124)
Accumulated other comprehensive income (loss) |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Balance, beginning of period | 3,186 | (340)
Net change related to other comprehensive income (loss) | (86) | 279
Balance, end of period | 3,110 | (61)
Accumulated other comprehensive income (loss) | Cumulative effect of accounting changes |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Balance, end of period | $ 10 | $ 0

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