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Cover
Jul. 28, 2025
Document Information [Line Items]  
Document Type S-1/A
Amendment Flag true
Amendment Description The registrant hereby amends this registration statement on such date or dates as may be necessary to delay its effective date until the registrant shall file a further amendment which specifically states that this registration statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933, as amended, or until this registration statement shall become effective on such date as the Securities and Exchange Commission, acting pursuant to said Section 8(a), may determine.
Entity Information [Line Items]  
Entity Registrant Name American Exceptionalism Acquisition Corp. A
Entity Central Index Key 0002079173
Entity Primary SIC Number 6770
Entity Tax Identification Number 98-1871331
Entity Incorporation, State or Country Code E9
Entity Filer Category Non-accelerated Filer
Entity Small Business true
Entity Emerging Growth Company true
Entity Ex Transition Period false
Entity Contact Personnel [Line Items]  
Entity Address, Address Line One 506 Santa Cruz Ave
Entity Address, Address Line Two Suite 300
Entity Address, City or Town Menlo Park
Entity Address, State or Province CA
Entity Address, Postal Zip Code 94025
Entity Phone Fax Numbers [Line Items]  
City Area Code 650
Local Phone Number 521-9007
Business Contact [Member]  
Entity Contact Personnel [Line Items]  
Contact Personnel Name Chamath Palihapitiya
Entity Address, Address Line One 506 Santa Cruz Ave
Entity Address, Address Line Two Suite 300
Entity Address, City or Town Menlo Park
Entity Address, State or Province CA
Entity Address, Postal Zip Code 94025
Entity Phone Fax Numbers [Line Items]  
City Area Code 650
Local Phone Number 521-9007