Investment Components (Detail) - USD ($) $ in Millions		Mar. 31, 2022	Jun. 30, 2021
Cash, Cash Equivalents and Investments [Line Items]
Debt investments, Adjusted Cost Basis		$ 97,048
Debt investments, Recorded Basis		95,970
Derivative, net		155	$ 258
Cash and cash equivalents		12,498	14,224
Short-term Investments		92,195	116,110
Equity Investments		6,907	5,984
Cash, cash equivalents, and investments		111,600	136,318
Equity investments
Cash, Cash Equivalents and Investments [Line Items]
Equity investments, Recorded Basis		8,141	6,960
Cash and cash equivalents		1,234	976
Short-term Investments		0	0
Equity Investments		6,907	5,984
Equity investments | Other
Cash, Cash Equivalents and Investments [Line Items]
Equity investments, Recorded Basis		6,284	5,378
Cash and cash equivalents		0	0
Short-term Investments		0	0
Equity Investments		6,284	5,378
Equity investments | Level 1
Cash, Cash Equivalents and Investments [Line Items]
Equity investments, Recorded Basis		1,857	1,582
Cash and cash equivalents		1,234	976
Short-term Investments		0	0
Equity Investments		623	606
Cash
Cash, Cash Equivalents and Investments [Line Items]
Cash		7,456	7,272
Cash and cash equivalents		7,456	7,272
Short-term Investments		0	0
Equity Investments		0	0
Derivatives, net
Cash, Cash Equivalents and Investments [Line Items]
Derivative, net	[1]	33	78
Cash and cash equivalents	[1]	0	0
Short-term Investments	[1]	33	78
Equity Investments	[1]	0	0
Debt investments
Cash, Cash Equivalents and Investments [Line Items]
Debt investments, Adjusted Cost Basis		97,048	117,966
Debt investments, Unrealized Gains		417	4,177
Debt investments, Unrealized Losses		(1,495)	(135)
Debt investments, Recorded Basis		95,970	122,008
Cash and cash equivalents		3,808	5,976
Short-term Investments		92,162	116,032
Equity Investments		0	0
Debt investments | Commercial Paper | Level 2
Cash, Cash Equivalents and Investments [Line Items]
Debt investments, Adjusted Cost Basis		883	4,316
Debt investments, Unrealized Gains		0	0
Debt investments, Unrealized Losses		0	0
Debt investments, Recorded Basis		883	4,316
Cash and cash equivalents		802	1,331
Short-term Investments		81	2,985
Equity Investments		0	0
Debt investments | Certificates of deposit | Level 2
Cash, Cash Equivalents and Investments [Line Items]
Debt investments, Adjusted Cost Basis		3,045	3,615
Debt investments, Unrealized Gains		0	0
Debt investments, Unrealized Losses		0	0
Debt investments, Recorded Basis		3,045	3,615
Cash and cash equivalents		3,003	2,920
Short-term Investments		42	695
Equity Investments		0	0
Debt investments | U.S. government securities | Level 1
Cash, Cash Equivalents and Investments [Line Items]
Debt investments, Adjusted Cost Basis		79,211	90,664
Debt investments, Unrealized Gains		347	3,832
Debt investments, Unrealized Losses		(1,174)	(111)
Debt investments, Recorded Basis		78,384	94,385
Cash and cash equivalents		3	1,500
Short-term Investments		78,381	92,885
Equity Investments		0	0
Debt investments | U.S. agency securities | Level 2
Cash, Cash Equivalents and Investments [Line Items]
Debt investments, Adjusted Cost Basis		417	807
Debt investments, Unrealized Gains		0	2
Debt investments, Unrealized Losses		(6)	0
Debt investments, Recorded Basis		411	809
Cash and cash equivalents		0	0
Short-term Investments		411	809
Equity Investments		0	0
Debt investments | Foreign government bonds | Level 2
Cash, Cash Equivalents and Investments [Line Items]
Debt investments, Adjusted Cost Basis		508	6,213
Debt investments, Unrealized Gains		3	9
Debt investments, Unrealized Losses		(10)	(2)
Debt investments, Recorded Basis		501	6,220
Cash and cash equivalents		0	225
Short-term Investments		501	5,995
Equity Investments		0	0
Debt investments | Mortgage- and asset-backed securities | Level 2
Cash, Cash Equivalents and Investments [Line Items]
Debt investments, Adjusted Cost Basis		602	3,442
Debt investments, Unrealized Gains		2	22
Debt investments, Unrealized Losses		(14)	(6)
Debt investments, Recorded Basis		590	3,458
Cash and cash equivalents		0	0
Short-term Investments		590	3,458
Equity Investments		0	0
Debt investments | Corporate notes and bonds | Level 2
Cash, Cash Equivalents and Investments [Line Items]
Debt investments, Adjusted Cost Basis		11,910	8,443
Debt investments, Unrealized Gains		31	249
Debt investments, Unrealized Losses		(277)	(9)
Debt investments, Recorded Basis		11,664	8,683
Cash and cash equivalents		0	0
Short-term Investments		11,664	8,683
Equity Investments		0	0
Debt investments | Corporate notes and bonds | Level 3
Cash, Cash Equivalents and Investments [Line Items]
Debt investments, Adjusted Cost Basis		45	63
Debt investments, Unrealized Gains		0	0
Debt investments, Unrealized Losses		0	0
Debt investments, Recorded Basis		45	63
Cash and cash equivalents		0	0
Short-term Investments		45	63
Equity Investments		0	0
Debt investments | Municipal securities | Level 2
Cash, Cash Equivalents and Investments [Line Items]
Debt investments, Adjusted Cost Basis		324	308
Debt investments, Unrealized Gains		34	63
Debt investments, Unrealized Losses		(7)	0
Debt investments, Recorded Basis		351	371
Cash and cash equivalents		0	0
Short-term Investments		351	371
Equity Investments		0	0
Debt investments | Municipal securities | Level 3
Cash, Cash Equivalents and Investments [Line Items]
Debt investments, Adjusted Cost Basis		103	95
Debt investments, Unrealized Gains		0	0
Debt investments, Unrealized Losses		(7)	(7)
Debt investments, Recorded Basis		96	88
Cash and cash equivalents		0	0
Short-term Investments		96	88
Equity Investments		$ 0	$ 0

[1] Refer to Note 5 – Derivatives for further information on the fair value of our derivative instruments.