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.