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Investment Components (Detail) - USD ($) $ in Millions | Sep. 30, 2023 | Jun. 30, 2023
--- | --- | ---
Cash Cash Equivalents And Investments [Line Items] |  |  |
Debt investments, Adjusted Cost Basis |  | $ 73,272 |
Debt investments, Recorded Basis |  | 68,408 |
Derivative, net |  | 342 | $ 267
Cash and cash equivalents |  | 80,452 | 34,704
Short-term Investments |  | 63,499 | 76,558
Equity Investments |  | 11,423 | 9,879
Cash, cash equivalents, and investments |  | 155,374 | 121,141
Equity Securities |  |  |
Cash Cash Equivalents And Investments [Line Items] |  |  |
Equity investments, Recorded Basis |  | 79,582 | 17,325
Cash and cash equivalents |  | 68,159 | 7,446
Short-term Investments |  | 0 | 0
Equity Investments |  | 11,423 | 9,879
Equity Securities | Other |  |  |
Cash Cash Equivalents And Investments [Line Items] |  |  |
Equity investments, Recorded Basis |  | 8,853 | 7,187
Cash and cash equivalents |  | 0 | 0
Short-term Investments |  | 0 | 0
Equity Investments |  | 8,853 | 7,187
Equity Securities | Level 1 |  |  |
Cash Cash Equivalents And Investments [Line Items] |  |  |
Equity investments, Recorded Basis |  | 70,729 | 10,138
Cash and cash equivalents |  | 68,159 | 7,446
Short-term Investments |  | 0 | 0
Equity Investments |  | 2,570 | 2,692
Cash |  |  |
Cash Cash Equivalents And Investments [Line Items] |  |  |
Cash |  | 7,378 | 8,478
Cash and cash equivalents |  | 7,378 | 8,478
Short-term Investments |  | 0 | 0
Equity Investments |  | 0 | 0
Derivatives, net |  |  |
Cash Cash Equivalents And Investments [Line Items] |  |  |
Derivative, net | [1] | 6 | 6
Cash and cash equivalents | [1] | 0 | 0
Short-term Investments | [1] | 6 | 6
Equity Investments | [1] | 0 | 0
Debt Securities |  |  |
Cash Cash Equivalents And Investments [Line Items] |  |  |
Debt investments, Adjusted Cost Basis |  | 73,272 | 99,869
Debt investments, Unrealized Gains |  | 8 | 13
Debt investments, Unrealized Losses |  | (4,872) | (4,550)
Debt investments, Recorded Basis |  | 68,408 | 95,332
Cash and cash equivalents |  | 4,915 | 18,780
Short-term Investments |  | 63,493 | 76,552
Equity Investments |  | 0 | 0
Debt Securities | Commercial Paper | Level 2 |  |  |
Cash Cash Equivalents And Investments [Line Items] |  |  |
Debt investments, Adjusted Cost Basis |  | 3,008 | 16,589
Debt investments, Unrealized Gains |  | 0 | 0
Debt investments, Unrealized Losses |  | 0 | 0
Debt investments, Recorded Basis |  | 3,008 | 16,589
Cash and cash equivalents |  | 3,005 | 12,231
Short-term Investments |  | 3 | 4,358
Equity Investments |  | 0 | 0
Debt Securities | Certificates of deposit | Level 2 |  |  |
Cash Cash Equivalents And Investments [Line Items] |  |  |
Debt investments, Adjusted Cost Basis |  | 1,694 | 2,701
Debt investments, Unrealized Gains |  | 0 | 0
Debt investments, Unrealized Losses |  | 0 | 0
Debt investments, Recorded Basis |  | 1,694 | 2,701
Cash and cash equivalents |  | 1,650 | 2,657
Short-term Investments |  | 44 | 44
Equity Investments |  | 0 | 0
Debt Securities | U.S. government securities | Level 1 |  |  |
Cash Cash Equivalents And Investments [Line Items] |  |  |
Debt investments, Adjusted Cost Basis |  | 56,210 | 65,237
Debt investments, Unrealized Gains |  | 2 | 2
Debt investments, Unrealized Losses |  | (4,147) | (3,870)
Debt investments, Recorded Basis |  | 52,065 | 61,369
Cash and cash equivalents |  | 255 | 2,991
Short-term Investments |  | 51,810 | 58,378
Equity Investments |  | 0 | 0
Debt Securities | U.S. agency securities | Level 2 |  |  |
Cash Cash Equivalents And Investments [Line Items] |  |  |
Debt investments, Adjusted Cost Basis |  | 29 | 2,703
Debt investments, Unrealized Gains |  | 0 | 0
Debt investments, Unrealized Losses |  | 0 | 0
Debt investments, Recorded Basis |  | 29 | 2,703
Cash and cash equivalents |  | 0 | 894
Short-term Investments |  | 29 | 1,809
Equity Investments |  | 0 | 0
Debt Securities | Foreign government bonds | Level 2 |  |  |
Cash Cash Equivalents And Investments [Line Items] |  |  |
Debt investments, Adjusted Cost Basis |  | 516 | 498
Debt investments, Unrealized Gains |  | 1 | 1
Debt investments, Unrealized Losses |  | (24) | (24)
Debt investments, Recorded Basis |  | 493 | 475
Cash and cash equivalents |  | 5 | 0
Short-term Investments |  | 488 | 475
Equity Investments |  | 0 | 0
Debt Securities | Mortgage- and asset-backed securities | Level 2 |  |  |
Cash Cash Equivalents And Investments [Line Items] |  |  |
Debt investments, Adjusted Cost Basis |  | 863 | 824
Debt investments, Unrealized Gains |  | 1 | 1
Debt investments, Unrealized Losses |  | (52) | (39)
Debt investments, Recorded Basis |  | 812 | 786
Cash and cash equivalents |  | 0 | 0
Short-term Investments |  | 812 | 786
Equity Investments |  | 0 | 0
Debt Securities | Corporate notes and bonds | Level 2 |  |  |
Cash Cash Equivalents And Investments [Line Items] |  |  |
Debt investments, Adjusted Cost Basis |  | 10,443 | 10,809
Debt investments, Unrealized Gains |  | 3 | 8
Debt investments, Unrealized Losses |  | (612) | (583)
Debt investments, Recorded Basis |  | 9,834 | 10,234
Cash and cash equivalents |  | 0 | 0
Short-term Investments |  | 9,834 | 10,234
Equity Investments |  | 0 | 0
Debt Securities | Corporate notes and bonds | Level 3 |  |  |
Cash Cash Equivalents And Investments [Line Items] |  |  |
Debt investments, Adjusted Cost Basis |  | 122 | 120
Debt investments, Unrealized Gains |  | 0 | 0
Debt investments, Unrealized Losses |  | 0 | 0
Debt investments, Recorded Basis |  | 122 | 120
Cash and cash equivalents |  | 0 | 0
Short-term Investments |  | 122 | 120
Equity Investments |  | 0 | 0
Debt Securities | Municipal securities | Level 2 |  |  |
Cash Cash Equivalents And Investments [Line Items] |  |  |
Debt investments, Adjusted Cost Basis |  | 283 | 285
Debt investments, Unrealized Gains |  | 1 | 1
Debt investments, Unrealized Losses |  | (21) | (18)
Debt investments, Recorded Basis |  | 263 | 268
Cash and cash equivalents |  | 0 | 7
Short-term Investments |  | 263 | 261
Equity Investments |  | 0 | 0
Debt Securities | Municipal securities | Level 3 |  |  |
Cash Cash Equivalents And Investments [Line Items] |  |  |
Debt investments, Adjusted Cost Basis |  | 104 | 103
Debt investments, Unrealized Gains |  | 0 | 0
Debt investments, Unrealized Losses |  | (16) | (16)
Debt investments, Recorded Basis |  | 88 | 87
Cash and cash equivalents |  | 0 | 0
Short-term Investments |  | 88 | 87
Equity Investments |  | $ 0 | $ 0
[1] | Refer to Note 5 – Derivatives for further information on the fair value of our derivative instruments.

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