Investment Components (Detail) - USD ($) $ in Millions		Dec. 31, 2024	Jun. 30, 2024
Cash Cash Equivalents And Investments [Line Items]
Debt investments, Adjusted Cost Basis		$ 65,613
Debt investments, Recorded Basis		63,181
Derivative, net		583	$ 180
Cash and cash equivalents		17,482	18,315
Short-term Investments		54,073	57,228
Equity and other investments		15,581	14,600
Cash, cash equivalents, and investments		87,136	90,143
Equity Securities
Cash Cash Equivalents And Investments [Line Items]
Equity investments, Recorded Basis		14,304	13,661
Cash and cash equivalents		1,000	561
Short-term Investments		0	0
Equity and other investments		13,304	13,100
Equity Securities | Other
Cash Cash Equivalents And Investments [Line Items]
Equity investments, Recorded Basis		9,879	10,114
Cash and cash equivalents		0	0
Short-term Investments		0	0
Equity and other investments		9,879	10,114
Equity Securities | Level 1
Cash Cash Equivalents And Investments [Line Items]
Equity investments, Recorded Basis		4,425	3,547
Cash and cash equivalents		1,000	561
Short-term Investments		0	0
Equity and other investments		3,425	2,986
Cash
Cash Cash Equivalents And Investments [Line Items]
Cash		9,647	11,571
Cash and cash equivalents		9,647	11,571
Short-term Investments		0	0
Equity and other investments		0	0
Derivatives, net
Cash Cash Equivalents And Investments [Line Items]
Derivative, net	[1]	4	12
Cash and cash equivalents	[1]	0	0
Short-term Investments	[1]	4	12
Equity and other investments	[1]	0	0
Debt Securities
Cash Cash Equivalents And Investments [Line Items]
Debt investments, Adjusted Cost Basis		65,613	68,209
Debt investments, Unrealized Gains		79	38
Debt investments, Unrealized Losses		(2,511)	(3,348)
Debt investments, Recorded Basis		63,181	64,899
Cash and cash equivalents		6,835	6,183
Short-term Investments		54,069	57,216
Equity and other investments		2,277	1,500
Debt Securities | Commercial Paper | Level 2
Cash Cash Equivalents And Investments [Line Items]
Debt investments, Adjusted Cost Basis		3,515	4,666
Debt investments, Unrealized Gains		0	0
Debt investments, Unrealized Losses		0	0
Debt investments, Recorded Basis		3,515	4,666
Cash and cash equivalents		3,515	4,666
Short-term Investments		0	0
Equity and other investments		0	0
Debt Securities | Certificates of deposit | Level 2
Cash Cash Equivalents And Investments [Line Items]
Debt investments, Adjusted Cost Basis		3,349	1,547
Debt investments, Unrealized Gains		0	0
Debt investments, Unrealized Losses		0	0
Debt investments, Recorded Basis		3,349	1,547
Cash and cash equivalents		3,302	1,503
Short-term Investments		47	44
Equity and other investments		0	0
Debt Securities | U.S. government securities | Level 1
Cash Cash Equivalents And Investments [Line Items]
Debt investments, Adjusted Cost Basis		46,013	49,603
Debt investments, Unrealized Gains		1	4
Debt investments, Unrealized Losses		(2,233)	(2,948)
Debt investments, Recorded Basis		43,781	46,659
Cash and cash equivalents		18	14
Short-term Investments		43,763	46,645
Equity and other investments		0	0
Debt Securities | U.S. agency securities | Level 2
Cash Cash Equivalents And Investments [Line Items]
Debt investments, Adjusted Cost Basis		11	17
Debt investments, Unrealized Gains		0	0
Debt investments, Unrealized Losses		0	0
Debt investments, Recorded Basis		11	17
Cash and cash equivalents		0	0
Short-term Investments		11	17
Equity and other investments		0	0
Debt Securities | Foreign government bonds | Level 2
Cash Cash Equivalents And Investments [Line Items]
Debt investments, Adjusted Cost Basis		311	319
Debt investments, Unrealized Gains		7	3
Debt investments, Unrealized Losses		(17)	(16)
Debt investments, Recorded Basis		301	306
Cash and cash equivalents		0	0
Short-term Investments		301	306
Equity and other investments		0	0
Debt Securities | Mortgage- and asset-backed securities | Level 2
Cash Cash Equivalents And Investments [Line Items]
Debt investments, Adjusted Cost Basis		987	944
Debt investments, Unrealized Gains		5	3
Debt investments, Unrealized Losses		(33)	(35)
Debt investments, Recorded Basis		959	912
Cash and cash equivalents		0	0
Short-term Investments		959	912
Equity and other investments		0	0
Debt Securities | Corporate notes and bonds | Level 2
Cash Cash Equivalents And Investments [Line Items]
Debt investments, Adjusted Cost Basis		8,693	9,106
Debt investments, Unrealized Gains		38	28
Debt investments, Unrealized Losses		(198)	(318)
Debt investments, Recorded Basis		8,533	8,816
Cash and cash equivalents		0	0
Short-term Investments		8,533	8,816
Equity and other investments		0	0
Debt Securities | Corporate notes and bonds | Level 3
Cash Cash Equivalents And Investments [Line Items]
Debt investments, Adjusted Cost Basis		2,376	1,641
Debt investments, Unrealized Gains		27	0
Debt investments, Unrealized Losses		(3)	(1)
Debt investments, Recorded Basis		2,400	1,640
Cash and cash equivalents		0	0
Short-term Investments		123	140
Equity and other investments		2,277	1,500
Debt Securities | Municipal securities | Level 2
Cash Cash Equivalents And Investments [Line Items]
Debt investments, Adjusted Cost Basis		254	262
Debt investments, Unrealized Gains		1	0
Debt investments, Unrealized Losses		(11)	(13)
Debt investments, Recorded Basis		244	249
Cash and cash equivalents		0	0
Short-term Investments		244	249
Equity and other investments		0	0
Debt Securities | Municipal securities | Level 3
Cash Cash Equivalents And Investments [Line Items]
Debt investments, Adjusted Cost Basis		104	104
Debt investments, Unrealized Gains		0	0
Debt investments, Unrealized Losses		(16)	(17)
Debt investments, Recorded Basis		88	87
Cash and cash equivalents		0	0
Short-term Investments		88	87
Equity and other investments		$ 0	$ 0

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