Note 8 – Debt

Debt and the related weighted average contractual interest rates are summarized as follows:

					Weighted average
					contractual interest rates
	September 30,		March 31,		September 30,			March 31,
	2018		2018		2018			2018
Commercial paper	$	25,287	$	27,313		2.32	%		1.80	%
Unsecured notes and loans payable		58,412		57,402		2.42	%		2.18	%
Secured notes and loans payable		14,529		13,638		2.36	%		1.95	%
Total debt	$	98,228	$	98,353		2.38	%		2.04	%

The carrying value of our debt includes unamortized premiums, discounts and debt issuance costs of $343 million and $353 million as of September 30, 2018 and March 31, 2018, respectively. The face value of commercial paper, unsecured notes and loans payable and secured notes and loans payable was $25.4 billion, $58.7 billion, and $14.6 billion, respectively, as of September 30, 2018, and $27.4 billion, $57.6 billion and $13.7 billion, respectively, as of March 31, 2018.

As of September 30, 2018, our commercial paper had a weighted average remaining maturity of 83 days, while our unsecured and secured notes and loans payable mature on various dates through fiscal 2049. Weighted average contractual interest rates are calculated based on original notional or par value before consideration of premium or discount.

Our unsecured notes and loans payable consist of both fixed and variable rate debt with contractual interest rates ranging from 0.0 percent to 5.0 percent at September 30, 2018 and March 31, 2018. Upon issuance of fixed rate notes, we generally elect to enter into interest rate swaps to convert fixed rate payments on notes to floating rate payments.

Our unsecured notes and loans payable contain covenants and conditions customary in transactions of this nature, including negative pledge provisions, cross-default provisions and limitations on certain consolidations, mergers and sales of assets. We are currently in compliance with these covenants and conditions.

Certain unsecured notes and loans payable are denominated in various foreign currencies, and include the impact of translation adjustments. At September 30, 2018 and March 31, 2018, the carrying values of these foreign currency denominated unsecured notes and loans payable were $11.7 billion and $13.3 billion, respectively. Concurrent with the issuance of these foreign currency unsecured notes and loans payable, we entered into currency swaps in the same notional amount to convert non-U.S. currency payments to U.S. dollar denominated payments.

Our secured notes and loans payable are denominated in U.S. dollars and consist of both fixed and variable rate debt with contractual interest rates ranging from 1.1 percent to 3.1 percent at September 30, 2018 and 1.1 percent to 2.5 percent at March 31, 2018. Secured notes and loans payable are issued using on-balance sheet securitization trusts, as further discussed in Note 9 – Variable Interest Entities. These notes are repayable only from collections on the underlying securitized retail finance receivables and the beneficial interests in investments in operating leases and from related credit enhancements.