Accounting Policies - Additional Information (Detail) - USD ($) $ in Billions	Sep. 30, 2025	Jun. 30, 2025
Significant Accounting Policies [Line Items]
Long-term accounts receivable, net of allowance for doubtful accounts	$ 5.0	$ 5.2
Other receivables related to purchase of components	14.4	8.2
Financing receivables, net	3.9	$ 4.3
OpenAI Global, LLC
Significant Accounting Policies [Line Items]
Total funding commitments	13.0
Amount funded	$ 11.6

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as noncurrent.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(9))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant