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Investment Components (Detail) - USD ($) $ in Millions | Jun. 30, 2020 | Jun. 30, 2019
--- | --- | ---
Cash, Cash Equivalents and Investments [Line Items] |  |  |
Debt investments, Cost Basis |  | $ 122,900 |
Debt investments, Recorded Basis |  | 129,798 |
Derivative, net |  | 246 | $ 137
Cash and cash equivalents |  | 13,576 | 11,356
Short-term Investments |  | 122,951 | 122,463
Equity Investments |  | 2,965 | 2,649
Cash, cash equivalents, and investments |  | 139,492 | 136,468
Equity investments |  |  |
Cash, Cash Equivalents and Investments [Line Items] |  |  |
Equity investments, Recorded Basis |  | 3,749 | 3,058
Cash and cash equivalents |  | 784 | 409
Short-term Investments |  | 0 | 0
Equity Investments |  | 2,965 | 2,649
Equity investments | Other |  |  |
Cash, Cash Equivalents and Investments [Line Items] |  |  |
Equity investments, Recorded Basis |  | 2,551 | 2,085
Cash and cash equivalents |  | 0 | 0
Short-term Investments |  | 0 | 0
Equity Investments |  | 2,551 | 2,085
Equity investments | Level 1 |  |  |
Cash, Cash Equivalents and Investments [Line Items] |  |  |
Equity investments, Recorded Basis |  | 1,198 | 973
Cash and cash equivalents |  | 784 | 409
Short-term Investments |  | 0 | 0
Equity Investments |  | 414 | 564
Cash |  |  |
Cash, Cash Equivalents and Investments [Line Items] |  |  |
Cash |  | 5,910 | 3,771
Cash and cash equivalents |  | 5,910 | 3,771
Short-term Investments |  | 0 | 0
Equity Investments |  | 0 | 0
Derivatives, net |  |  |
Cash, Cash Equivalents and Investments [Line Items] |  |  |
Derivative, net | [1] | 35 | (13)
Cash and cash equivalents | [1] | 0 | 0
Short-term Investments | [1] | 35 | (13)
Equity Investments | [1] | 0 | 0
Debt investments |  |  |
Cash, Cash Equivalents and Investments [Line Items] |  |  |
Debt investments, Cost Basis |  | 122,900 | 127,747
Debt investments, Unrealized Gains |  | 6,929 | 2,027
Debt investments, Unrealized Losses |  | (31) | (122)
Debt investments, Recorded Basis |  | 129,798 | 129,652
Cash and cash equivalents |  | 6,882 | 7,176
Short-term Investments |  | 122,916 | 122,476
Equity Investments |  | 0 | 0
Debt investments | Commercial Paper | Level 2 |  |  |
Cash, Cash Equivalents and Investments [Line Items] |  |  |
Debt investments, Cost Basis |  | 4,687 | 2,211
Debt investments, Unrealized Gains |  | 1 | 0
Debt investments, Unrealized Losses |  | 0 | 0
Debt investments, Recorded Basis |  | 4,688 | 2,211
Cash and cash equivalents |  | 1,618 | 1,773
Short-term Investments |  | 3,070 | 438
Equity Investments |  | 0 | 0
Debt investments | Certificates of deposit | Level 2 |  |  |
Cash, Cash Equivalents and Investments [Line Items] |  |  |
Debt investments, Cost Basis |  | 2,898 | 2,018
Debt investments, Unrealized Gains |  | 0 | 0
Debt investments, Unrealized Losses |  | 0 | 0
Debt investments, Recorded Basis |  | 2,898 | 2,018
Cash and cash equivalents |  | 1,646 | 1,430
Short-term Investments |  | 1,252 | 588
Equity Investments |  | 0 | 0
Debt investments | U.S. government securities | Level 1 |  |  |
Cash, Cash Equivalents and Investments [Line Items] |  |  |
Debt investments, Cost Basis |  | 92,067 | 104,925
Debt investments, Unrealized Gains |  | 6,495 | 1,854
Debt investments, Unrealized Losses |  | (1) | (104)
Debt investments, Recorded Basis |  | 98,561 | 106,675
Cash and cash equivalents |  | 3,168 | 769
Short-term Investments |  | 95,393 | 105,906
Equity Investments |  | 0 | 0
Debt investments | U.S. agency securities | Level 2 |  |  |
Cash, Cash Equivalents and Investments [Line Items] |  |  |
Debt investments, Cost Basis |  | 2,439 | 988
Debt investments, Unrealized Gains |  | 2 | 0
Debt investments, Unrealized Losses |  | 0 | 0
Debt investments, Recorded Basis |  | 2,441 | 988
Cash and cash equivalents |  | 449 | 698
Short-term Investments |  | 1,992 | 290
Equity Investments |  | 0 | 0
Debt investments | Foreign government bonds | Level 2 |  |  |
Cash, Cash Equivalents and Investments [Line Items] |  |  |
Debt investments, Cost Basis |  | 6,982 | 6,350
Debt investments, Unrealized Gains |  | 6 | 4
Debt investments, Unrealized Losses |  | (3) | (8)
Debt investments, Recorded Basis |  | 6,985 | 6,346
Cash and cash equivalents |  | 1 | 2,506
Short-term Investments |  | 6,984 | 3,840
Equity Investments |  | 0 | 0
Debt investments | Mortgage- and asset-backed securities | Level 2 |  |  |
Cash, Cash Equivalents and Investments [Line Items] |  |  |
Debt investments, Cost Basis |  | 4,865 | 3,554
Debt investments, Unrealized Gains |  | 41 | 10
Debt investments, Unrealized Losses |  | (6) | (3)
Debt investments, Recorded Basis |  | 4,900 | 3,561
Cash and cash equivalents |  | 0 | 0
Short-term Investments |  | 4,900 | 3,561
Equity Investments |  | 0 | 0
Debt investments | Corporate notes and bonds | Level 2 |  |  |
Cash, Cash Equivalents and Investments [Line Items] |  |  |
Debt investments, Cost Basis |  | 8,500 | 7,437
Debt investments, Unrealized Gains |  | 327 | 111
Debt investments, Unrealized Losses |  | (17) | (7)
Debt investments, Recorded Basis |  | 8,810 | 7,541
Cash and cash equivalents |  | 0 | 0
Short-term Investments |  | 8,810 | 7,541
Equity Investments |  | 0 | 0
Debt investments | Corporate notes and bonds | Level 3 |  |  |
Cash, Cash Equivalents and Investments [Line Items] |  |  |
Debt investments, Cost Basis |  | 58 | 15
Debt investments, Unrealized Gains |  | 0 | 0
Debt investments, Unrealized Losses |  | 0 | 0
Debt investments, Recorded Basis |  | 58 | 15
Cash and cash equivalents |  | 0 | 0
Short-term Investments |  | 58 | 15
Equity Investments |  | 0 | 0
Debt investments | Municipal securities | Level 2 |  |  |
Cash, Cash Equivalents and Investments [Line Items] |  |  |
Debt investments, Cost Basis |  | 313 | 242
Debt investments, Unrealized Gains |  | 57 | 48
Debt investments, Unrealized Losses |  | (4) | 0
Debt investments, Recorded Basis |  | 366 | 290
Cash and cash equivalents |  | 0 | 0
Short-term Investments |  | 366 | 290
Equity Investments |  | 0 | 0
Debt investments | Municipal securities | Level 3 |  |  |
Cash, Cash Equivalents and Investments [Line Items] |  |  |
Debt investments, Cost Basis |  | 91 | 7
Debt investments, Unrealized Gains |  | 0 | 0
Debt investments, Unrealized Losses |  | 0 | 0
Debt investments, Recorded Basis |  | 91 | 7
Cash and cash equivalents |  | 0 | 0
Short-term Investments |  | 91 | 7
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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