SCHEDULE 13G

Amendment No. 2 
Sanmina-SCI Corporation 
Common Stock 
Cusip #800907107 


Cusip #800907107 
Item 1:	Reporting Person - FMR Corp.
Item 4:	Delaware
Item 5:	569,152 
Item 6:	0 
Item 7:	10,175,485 
Item 8:	0 
Item 9:	10,175,485 
Item 11:	1.941% 
Item 12:	    HC


Cusip #800907107  
Item 1:	Reporting Person - Edward C. Johnson 3d 
Item 4:	United States of America
Item 5:	0 
Item 6:	0 
Item 7:	10,175,485 
Item 8:	0 
Item 9:	10,175,485 
Item 11:	1.941% 
Item 12:	IN 


Cusip #800907107 
Item 1:	Reporting Person - Abigail P. Johnson 
Item 4:	United States of America
Item 5:	0 
Item 6:	0 
Item 7:	10,175,485 
Item 8:	0 
Item 9:	10,175,485 
Item 11:	1.941% 
Item 12:	    IN



	SCHEDULE 13G - TO BE INCLUDED IN 
STATEMENTS
	FILED PURSUANT TO RULE 13d-1(b) or 13d-2(b)




Item 1(a).	Name of Issuer:	

		Sanmina-SCI Corporation 

Item 1(b).	Name of Issuer's Principal Executive Offices:

		2700 North First Street  
		San Jose, CA  95134
		  

Item 2(a).	Name of Person Filing: 

		FMR Corp.

Item 2(b).	Address or Principal Business Office or, if None, 
Residence:

		82 Devonshire Street, Boston, 
Massachusetts  02109

Item 2(c).	Citizenship:

		Not applicable

Item 2(d).	Title of Class of Securities:

		Common Stock 

Item 2(e).	CUSIP Number:  

		800907107 

Item 3.	This statement is filed pursuant to Rule 13d-1(b) or 13d-2(b) 
and the person filing, FMR Corp., is a parent holding company 
in accordance with Section 240.13d-1(b)(ii)(G).  (Note:  See 
Item 7).

Item 4.	Ownership

	(a)	Amount Beneficially Owned:	10,175,485 

	(b)	Percent of Class:	1.941% 

	(c)	Number of shares as to which such 
person has:  

	(i)	sole power to vote or to direct 
the vote:	569,152 

	(ii)	shared power to vote or to 
direct the vote:	0 

	(iii)	sole power to dispose or to 
direct the disposition of:	10,175,485 

	(iv)	shared power to dispose or to 
direct the disposition of:	0 



Item 5.	Ownership of Five Percent or Less of a Class.

	If this statement is being filed to report the fact that as of the 
date hereof, the reporting person has ceased to be the 
beneficial owner of more than five percent of the class of 
securities, check the following (X).

Item 6.	Ownership of More than Five Percent on Behalf of Another 
Person.

	Not applicable

Item 7.	Identification and Classification of the Subsidiary Which 
Acquired the Security Being Reported on By the Parent 
Holding Company.

	See attached Exhibit(s) A, B. 

Item 8.	Identification and Classification of Members of 
the Group.

	Not Applicable. See attached Exhibit A. 

Item 9.	Notice of Dissolution of Group.

	Not applicable.

Item 10.	Certification.

	Inasmuch as the reporting persons are no longer the beneficial 
owners of more than five percent of the number of shares 
outstanding, the reporting persons have no further reporting 
obligation under Section 13(d) of the Securities and Exchange 
Commission thereunder, and the reporting persons have no 
obligation to amend this Statement if any material change 
occurs in the facts set forth herein.

Signature

	After reasonable inquiry and to the best of my knowledge and 
belief, I certify that the information set forth in this Schedule 
13G in connection with FMR Corp.'s beneficial ownership of 
the Common Stock of Sanmina-SCI Corporation at December 
31, 2004 is true, complete and correct. 

February 14, 2005 			
Date

/s/Eric D. Roiter				
Signature

Eric D. Roiter				
Duly authorized under Power of Attorney
dated December 30, 1997 by and on behalf
of FMR Corp. and its direct and indirect
subsidiaries


	SCHEDULE 13G - TO BE INCLUDED IN 
STATEMENTS
	FILED PURSUANT TO RULE 13d-1(b) or 13d-2(b)



	Pursuant to the instructions in Item 7 of Schedule 
13G, Fidelity Management & Research Company 
("Fidelity"), 82 Devonshire Street, Boston, Massachusetts 
02109, a wholly-owned subsidiary of FMR Corp. and an 
investment adviser registered under Section 203 of the 
Investment Advisers Act of 1940, is the beneficial owner of 
9,603,829 shares or 1.832% of the Common Stock 
outstanding of Sanmina-SCI Corporation  ("the Company") 
as a result of acting as investment adviser to various 
investment companies registered under Section 8 of the 
Investment Company Act of 1940. The number of shares of 
Common Stock of Sanmina-SCI Corporation owned by the 
investment companies at December 31, 2004 included 
469,989 shares of Common Stock resulting from the assumed 
conversion of $72,500,000 principal amount of SANMINA 
CORP CONV 0% 9/12/20 (6.4826 shares of Common Stock 
for each $1,000 principal amount of debenture).

	Edward C. Johnson 3d, FMR Corp., through its 
control of Fidelity, and the funds each has sole power to 
dispose of the 9,603,829 shares owned by the Funds.

	Neither FMR Corp. nor Edward C. Johnson 3d, 
Chairman of FMR Corp., has the sole power to vote or direct 
the voting of the shares owned directly by the Fidelity Funds, 
which power resides with the Funds' Boards of Trustees.  
Fidelity carries out the voting of the shares under written 
guidelines established by the Funds' Boards of Trustees.

	Fidelity Management Trust Company, 82 Devonshire 
Street, Boston, Massachusetts 02109, a wholly-owned 
subsidiary of FMR Corp. and a bank as defined in Section 
3(a)(6) of the Securities Exchange Act of 1934, is the 
beneficial owner of  570,856 shares or 0.109% of the 
Common Stock outstanding of the Company as a result of its 
serving as investment manager of the institutional account(s). 
The number of shares of Common Stock of Sanmina-SCI 
Corporation owned by the institutional account(s) at 
December 31, 2004 included 15,961 shares of Common 
Stock resulting from the assumed conversion of $660,000 
principal amount of SCI SYSTEMS 3% CSD 3/15/07 
(24.1838 shares of Common Stock for each $1,000 principal 
amount of debenture).

	Edward C. Johnson 3d and FMR Corp., through its 
control of Fidelity Management Trust Company, each has 
sole dispositive power over 570,856 shares and sole power to 
vote or to direct the voting of 567,712 shares, and no power 
to vote or to direct the voting of 3,144 shares of Common 
Stock owned by the institutional account(s) as reported 
above.

	Strategic Advisers, Inc., 82 Devonshire Street, 
Boston, MA 02109, a wholly-owned subsidiary of FMR 
Corp. and an investment adviser registered under Section 203 
of the Investment Advisers Act of 1940, provides investment 
advisory services to individuals.  As such, FMR Corp.'s 
beneficial ownership includes 800 shares, or 0.000%, of the 
Common Stock stock outstanding of Sanmina-SCI 
Corporation, beneficially owned through Strategic Advisers, 
Inc.

	Members of the Edward C. Johnson 3d family are the 
predominant owners of Class B shares of common stock of 
FMR Corp., representing approximately 49% of the voting 
power of FMR Corp.  Mr. Johnson 3d owns 12.0% and 
Abigail Johnson owns 24.5% of the aggregate outstanding 
voting stock of FMR Corp.  Mr. Johnson 3d is Chairman of 
FMR Corp. and Abigail P. Johnson is a Director of FMR 
Corp.  The Johnson family group and all other Class B 
shareholders have entered into a shareholders' voting 
agreement under which all Class B shares will be voted in 
accordance with the majority vote of Class B shares.  
Accordingly, through their ownership of voting common 
stock and the execution of the shareholders' voting 
agreement, members of the Johnson family may be deemed, 
under the Investment Company Act of 1940, to form a 
controlling group with respect to FMR Corp.

 


	SCHEDULE 13G - TO BE INCLUDED IN 
STATEMENTS
	FILED PURSUANT TO RULE 13d-1(b) or 13d-2(b)
	RULE 13d-1(f)(1)  AGREEMENT

	The undersigned persons, on February 14, 2005, agree 
and consent to the joint filing on their behalf of this Schedule 
13G in connection with their beneficial ownership of the 
Common Stock of Sanmina-SCI Corporation at December 31, 
2004.

	FMR Corp.

	By /s/ Eric D. Roiter			
	Eric D. Roiter
	Duly authorized under Power of Attorney
	dated December 30, 1997, by and on behalf
	of FMR Corp. and its direct and indirect 
	subsidiaries

	Edward C. Johnson 3d

	By /s/ Eric D. Roiter			
	Eric D. Roiter
	Duly authorized under Power of Attorney
	dated December 30, 1997, by and on behalf
	of Edward C. Johnson 3d

	Abigail P. Johnson

	By /s/ Eric D. Roiter			
	Eric D. Roiter
	Duly authorized under Power of Attorney
	dated December 30, 1997, by and on behalf
	of Abigail P. Johnson

	Fidelity Management & Research Company

	By /s/ Eric D. Roiter			
	Eric D. Roiter
	Senior V.P. and General Counsel