Investment Components (Detail) - USD ($) $ in Millions		Jun. 30, 2022	Jun. 30, 2021
Cash Cash Equivalents And Investments [Line Items]
Debt investments, Adjusted Cost Basis		$ 98,118
Debt investments, Recorded Basis		95,357
Derivative, net		226	$ 258
Cash and cash equivalents		13,931	14,224
Short-term Investments		90,826	116,110
Equity Investments		6,891	5,984
Cash, cash equivalents, and investments		111,648	136,318
Equity Securities
Cash Cash Equivalents And Investments [Line Items]
Equity investments, Recorded Basis		8,025	6,960
Cash and cash equivalents		1,134	976
Short-term Investments		0	0
Equity Investments		6,891	5,984
Equity Securities | Other
Cash Cash Equivalents And Investments [Line Items]
Equity investments, Recorded Basis		6,435	5,378
Cash and cash equivalents		0	0
Short-term Investments		0	0
Equity Investments		6,435	5,378
Equity Securities | Level 1
Cash Cash Equivalents And Investments [Line Items]
Equity investments, Recorded Basis		1,590	1,582
Cash and cash equivalents		1,134	976
Short-term Investments		0	0
Equity Investments		456	606
Cash
Cash Cash Equivalents And Investments [Line Items]
Cash		8,258	7,272
Cash and cash equivalents		8,258	7,272
Short-term Investments		0	0
Equity Investments		0	0
Derivatives, net
Cash Cash Equivalents And Investments [Line Items]
Derivative, net	[1]	8	78
Cash and cash equivalents	[1]	0	0
Short-term Investments	[1]	8	78
Equity Investments	[1]	0	0
Debt Securities
Cash Cash Equivalents And Investments [Line Items]
Debt investments, Adjusted Cost Basis		98,118	117,966
Debt investments, Unrealized Gains		53	4,177
Debt investments, Unrealized Losses		(2,814)	(135)
Debt investments, Recorded Basis		95,357	122,008
Cash and cash equivalents		4,539	5,976
Short-term Investments		90,818	116,032
Equity Investments		0	0
Debt Securities | Commercial Paper | Level 2
Cash Cash Equivalents And Investments [Line Items]
Debt investments, Adjusted Cost Basis		2,500	4,316
Debt investments, Unrealized Gains		0	0
Debt investments, Unrealized Losses		0	0
Debt investments, Recorded Basis		2,500	4,316
Cash and cash equivalents		2,498	1,331
Short-term Investments		2	2,985
Equity Investments		0	0
Debt Securities | Certificates of deposit | Level 2
Cash Cash Equivalents And Investments [Line Items]
Debt investments, Adjusted Cost Basis		2,071	3,615
Debt investments, Unrealized Gains		0	0
Debt investments, Unrealized Losses		0	0
Debt investments, Recorded Basis		2,071	3,615
Cash and cash equivalents		2,032	2,920
Short-term Investments		39	695
Equity Investments		0	0
Debt Securities | U.S. government securities | Level 1
Cash Cash Equivalents And Investments [Line Items]
Debt investments, Adjusted Cost Basis		79,696	90,664
Debt investments, Unrealized Gains		29	3,832
Debt investments, Unrealized Losses		(2,178)	(111)
Debt investments, Recorded Basis		77,547	94,385
Cash and cash equivalents		9	1,500
Short-term Investments		77,538	92,885
Equity Investments		0	0
Debt Securities | U.S. agency securities | Level 2
Cash Cash Equivalents And Investments [Line Items]
Debt investments, Adjusted Cost Basis		419	807
Debt investments, Unrealized Gains		0	2
Debt investments, Unrealized Losses		(9)	0
Debt investments, Recorded Basis		410	809
Cash and cash equivalents		0	0
Short-term Investments		410	809
Equity Investments		0	0
Debt Securities | Foreign government bonds | Level 2
Cash Cash Equivalents And Investments [Line Items]
Debt investments, Adjusted Cost Basis		506	6,213
Debt investments, Unrealized Gains		0	9
Debt investments, Unrealized Losses		(24)	(2)
Debt investments, Recorded Basis		482	6,220
Cash and cash equivalents		0	225
Short-term Investments		482	5,995
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		727	3,442
Debt investments, Unrealized Gains		1	22
Debt investments, Unrealized Losses		(30)	(6)
Debt investments, Recorded Basis		698	3,458
Cash and cash equivalents		0	0
Short-term Investments		698	3,458
Equity Investments		0	0
Debt Securities | Corporate notes and bonds | Level 2
Cash Cash Equivalents And Investments [Line Items]
Debt investments, Adjusted Cost Basis		11,661	8,443
Debt investments, Unrealized Gains		4	249
Debt investments, Unrealized Losses		(554)	(9)
Debt investments, Recorded Basis		11,111	8,683
Cash and cash equivalents		0	0
Short-term Investments		11,111	8,683
Equity Investments		0	0
Debt Securities | Corporate notes and bonds | Level 3
Cash Cash Equivalents And Investments [Line Items]
Debt investments, Adjusted Cost Basis		67	63
Debt investments, Unrealized Gains		0	0
Debt investments, Unrealized Losses		0	0
Debt investments, Recorded Basis		67	63
Cash and cash equivalents		0	0
Short-term Investments		67	63
Equity Investments		0	0
Debt Securities | Municipal securities | Level 2
Cash Cash Equivalents And Investments [Line Items]
Debt investments, Adjusted Cost Basis		368	308
Debt investments, Unrealized Gains		19	63
Debt investments, Unrealized Losses		(13)	0
Debt investments, Recorded Basis		374	371
Cash and cash equivalents		0	0
Short-term Investments		374	371
Equity Investments		0	0
Debt Securities | 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		(6)	(7)
Debt investments, Recorded Basis		97	88
Cash and cash equivalents		0	0
Short-term Investments		97	88
Equity Investments		$ 0	$ 0

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