AMAZON COM INC | 2013 | FY | 3


LONG-TERM DEBT
In November 2012, we issued $3.0 billion of unsecured senior notes in three tranches as described in the table below (collectively, the “Notes”). As of December 31, 2013 and 2012, the unamortized discount on the Notes was $23 million and $27 million. We also have other long-term debt with a carrying amount, including the current portion, of $967 million and $691 million as of December 31, 2013 and 2012. The face value of our total long-term debt obligations is as follows (in millions):

 
December 31,
 
2013
 
2012
0.65% Notes due on November 27, 2015
$
750

 
$
750

1.20% Notes due on November 29, 2017
1,000

 
1,000

2.50% Notes due on November 29, 2022
1,250

 
1,250

Other long-term debt
967

 
691

Total debt
3,967

 
3,691

Less current portion of long-term debt
(753
)
 
(579
)
Face value of long-term debt
$
3,214

 
$
3,112


The effective interest rates of the 2015, 2017, and 2022 Notes were 0.84%, 1.38%, and 2.66%. Interest on the Notes is payable semi-annually in arrears in May and November. We may redeem the Notes at any time in whole, or from time to time, in part at specified redemption prices. We are not subject to any financial covenants under the Notes. We used the net proceeds from the issuance of the Notes for general corporate purposes. The estimated fair value of the Notes was approximately $2.9 billion and $3.0 billion as of December 31, 2013 and 2012, which is based on quoted prices for our publicly-traded debt as of that date.
The other debt, including the current portion, had a weighted average interest rate of 5.5% and 6.4% as of December 31, 2013 and 2012. We used the net proceeds from the issuance of the debt to primarily fund certain international operations. The estimated fair value of the other long-term debt, which is based on Level 2 inputs, approximated its carrying value as of December 31, 2013 and 2012.
As of December 31, 2013, future principal payments for debt were as follows (in millions):
 
Year Ended December 31,
2014
$
753

2015
853

2016
36

2017
1,037

2018
38

Thereafter
1,250

 
$
3,967


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