Debt, net of unamortized original issue discounts or premiums, and unamortized debt issuance costs, consists of the following:



	March 31, 2018			December 31, 2017
Accounts Receivable Securitization Facility expiring 2018 (1)	$	699		$	695
$3.0 billion ABL Facility expiring 2021 (2)	1,365			1,670
4 ⁵/₈ percent Senior Secured Notes due 2023	992			992
5 ³/₄ percent Senior Notes due 2024	841			841
5 ¹/₂ percent Senior Notes due 2025	793			793
4 ⁵/₈ percent Senior Notes due 2025	740			740
5 ⁷/₈ percent Senior Notes due 2026	998			998
5 ¹/₂ percent Senior Notes due 2027	991			990
4 ⁷/₈ percent Senior Notes due 2028 (3)	1,649			1,648
4 ⁷/₈ percent Senior Notes due 2028 (3)	4			6
Capital leases	66			67
Total debt	9,138			9,440
Less short-term portion (4)	(726		)	(723		)
Total long-term debt	$	8,412		$	8,717

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(1)

At March 31, 2018, $67 was available under our accounts receivable securitization facility. The interest rate applicable to the accounts receivable securitization facility was 2.6 percent at March 31, 2018. During the three months ended March 31, 2018, the monthly average principal amount outstanding under the accounts receivable securitization facility was $710, and the weighted-average interest rate thereon was 2.5 percent. The maximum month-end principal amount outstanding under the accounts receivable securitization facility during the three months ended March 31, 2018 was $720. Borrowings under the accounts receivable securitization facility are permitted only to the extent that the face amount of the receivables in the collateral pool, net of applicable reserves and other deductions, exceeds the outstanding loans. As of March 31, 2018, there were $767 of receivables, net of applicable reserves and other deductions, in the collateral pool.

(2)

At March 31, 2018, $1.590 billion was available under our ABL facility, net of $37 of letters of credit. The interest rate applicable to the ABL facility was 3.2 percent at March 31, 2018. During the three months ended March 31, 2018, the monthly average principal amount outstanding under the ABL facility was $1.265 billion, and the weighted-average interest rate thereon was 3.1 percent. The maximum month-end principal amount outstanding under the ABL facility during the three months ended March 31, 2018 was $1.373 billion.


(3)	URNA separately issued 4 ⁷/₈ percent Senior Notes in August 2017 and in September 2017. Following the issuances, we consummated an exchange offer pursuant to which most of the 4 ⁷/₈ percent Senior Notes issued in September 2017 were exchanged for additional notes fungible with the 4 ⁷/₈ percent Senior Notes issued in August 2017.


(4)	As of March 31, 2018, our short-term debt primarily reflects $699 of borrowings under our accounts receivable securitization facility.