You may check CBP web site for detail.
;-lXU0}& z&)A,ryW0 http://www.cbp.gov P>C~
i:4n %#:{UR)E The following is mentioned in U.S. Customs and Border Protection Declaration Form
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F[ qp}
Cqi Money And Other Monetary
qPK*%Q<; Instruments
&K.d'$q You may bring into or take out of the country, including
KnQ*vM*VM by mail, as much money as you wish. However, if
;O6;.5q& it is more than $10,000, you will need to report it to
3?9IJ5p CBP. Ask the CBP officer for the Currency Reporting
gQg"j) Form (FinCen 105). The penalties for non-compliance
RDi]2 can be severe.
K~{$oD
7! “Money” means monetary instruments and includes U.S.
t;Sb/ 3 or foreign coins currently in circulation, currency, travelers’
`Bp.RXsd* checks in any form, money orders, and negotiable
`/XY>T}- instruments or investment securities in bearer form.