Cover Page - USD ($) $ in Trillions	12 Months Ended
Cover Page - USD ($) $ in Trillions	Dec. 31, 2025	Jan. 28, 2026	Jun. 30, 2025
Document Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2025
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-37580
Entity Registrant Name	Alphabet Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	61-1767919
Entity Address, Address Line One	1600 Amphitheatre Parkway
Entity Address, City or Town	Mountain View
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94043
City Area Code	650
Local Phone Number	253-0000
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 1.9
Documents Incorporated by Reference	DOCUMENTS INCORPORATED BY REFERENCE Portions of the registrant’s Proxy Statement for the 2026 Annual Meeting of Stockholders are incorporated herein by reference in Part III of this Annual Report on Form 10-K to the extent stated herein. Such proxy statement will be filed with the Securities and Exchange Commission within 120 days of the registrant’s fiscal year ended December 31, 2025.
Amendment Flag	false
Document Fiscal Year Focus	2025
Document Fiscal Period Focus	FY
Entity Central Index Key	0001652044
Class A
Document Information [Line Items]
Title of 12(b) Security	Class A Common Stock, $0.001 par value
Trading Symbol	GOOGL
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		5,822,000,000
Class C
Document Information [Line Items]
Title of 12(b) Security	Class C Capital Stock, $0.001 par value
Trading Symbol	GOOG
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		5,438,000,000
2.375% Senior Notes due 2028
Document Information [Line Items]
Title of 12(b) Security	2.375% Senior Notes due 2028
No Trading Symbol Flag	true
Security Exchange Name	NASDAQ
2.500% Senior Notes due 2029
Document Information [Line Items]
Title of 12(b) Security	2.500% Senior Notes due 2029
No Trading Symbol Flag	true
Security Exchange Name	NASDAQ
2.875% Senior Notes due 2031
Document Information [Line Items]
Title of 12(b) Security	2.875% Senior Notes due 2031
No Trading Symbol Flag	true
Security Exchange Name	NASDAQ
3.000% Senior Notes due 2033
Document Information [Line Items]
Title of 12(b) Security	3.000% Senior Notes due 2033
No Trading Symbol Flag	true
Security Exchange Name	NASDAQ
3.125% Senior Notes due 2034
Document Information [Line Items]
Title of 12(b) Security	3.125% Senior Notes due 2034
No Trading Symbol Flag	true
Security Exchange Name	NASDAQ
3.375% Senior Notes due 2037
Document Information [Line Items]
Title of 12(b) Security	3.375% Senior Notes due 2037
No Trading Symbol Flag	true
Security Exchange Name	NASDAQ
3.500% Senior Notes due 2038
Document Information [Line Items]
Title of 12(b) Security	3.500% Senior Notes due 2038
No Trading Symbol Flag	true
Security Exchange Name	NASDAQ
4.000% Senior Notes due 2044
Document Information [Line Items]
Title of 12(b) Security	4.000% Senior Notes due 2044
No Trading Symbol Flag	true
Security Exchange Name	NASDAQ
3.875% Senior Notes due 2045
Document Information [Line Items]
Title of 12(b) Security	3.875% Senior Notes due 2045
No Trading Symbol Flag	true
Security Exchange Name	NASDAQ
4.000% Senior Notes due 2054
Document Information [Line Items]
Title of 12(b) Security	4.000% Senior Notes due 2054
No Trading Symbol Flag	true
Security Exchange Name	NASDAQ
4.375% Senior Notes due 2064
Document Information [Line Items]
Title of 12(b) Security	4.375% Senior Notes due 2064
No Trading Symbol Flag	true
Security Exchange Name	NASDAQ
Class B
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		837,000,000