Debt (Tables)

3 Months Ended

Mar. 31, 2020

Long-term debt included in the condensed consolidated balance sheets consisted of (in millions):



	March 31, 2020		December 31, 2019
Secured
2013 Credit Facilities, variable interest rate of 2.71%, installments through 2025	$	1,807	$	1,807
2014 Credit Facilities, variable interest rate of 2.69%, installments through 2027	1,220		1,202
April 2016 Credit Facilities, variable interest rate of 2.94%, installments through 2023	970		970
December 2016 Credit Facilities, variable interest rate of 2.70%, installments through 2023	1,213		1,213
Delayed Draw Term Loan Credit Facility, variable interest rate of 3.00%, interest only payments until due March 2021	1,000		—
Enhanced equipment trust certificates (EETCs), fixed interest rates ranging from 3.00% to 8.39%, averaging 4.03%, maturing from 2020 to 2032	11,712		11,933
Equipment loans and other notes payable, fixed and variable interest rates ranging from 1.87% to 7.31%, averaging 3.02%, maturing from 2020 to 2032	4,755		4,727
Special facility revenue bonds, fixed interest rates ranging from 5.00% to 8.00%, maturing from 2020 to 2031	754		754
	23,431		22,606
Unsecured
5.000% senior notes, interest only payments until due in June 2022	750		750
3.75% senior notes, interest only payments until due in March 2025	500		—
4.625% senior notes	—		500
	1,250		1,250
Total long-term debt	24,681		23,856
Less: Total unamortized debt discount, premium and issuance costs	233		211
Less: Current maturities	3,415		2,749
Long-term debt, net of current maturities	$	21,033	$	20,896

The table below shows the maximum availability under revolving credit facilities, all of which were undrawn, as of March 31, 2020 (in millions):



2013 Revolving Facility	$	750
2014 Revolving Facility	1,643
April 2016 Revolving Facility	450
Other Short-term Revolving Facility	400
Total	$	3,243

Long-term debt included in the condensed consolidated balance sheets consisted of (in millions):



	March 31, 2020		December 31, 2019
Secured
2013 Credit Facilities, variable interest rate of 2.71%, installments through 2025	$	1,807	$	1,807
2014 Credit Facilities, variable interest rate of 2.69%, installments through 2027	1,220		1,202
April 2016 Credit Facilities, variable interest rate of 2.94%, installments through 2023	970		970
December 2016 Credit Facilities, variable interest rate of 2.70%, installments through 2023	1,213		1,213
Delayed Draw Term Loan Credit Facility, variable interest rate of 3.00%, interest only payments until due March 2021	1,000		—
Enhanced equipment trust certificates (EETCs), fixed interest rates ranging from 3.00% to 8.39%, averaging 4.03%, maturing from 2020 to 2032	11,712		11,933
Equipment loans and other notes payable, fixed and variable interest rates ranging from 1.87% to 7.31%, averaging 3.02%, maturing from 2020 to 2032	4,755		4,727
Special facility revenue bonds, fixed interest rate of 5.00%, maturing from 2020 to 2031	725		725
Total long-term debt	23,402		22,577
Less: Total unamortized debt discount, premium and issuance costs	221		205
Less: Current maturities	3,414		2,246
Long-term debt, net of current maturities	$	19,767	$	20,126

The table below shows the maximum availability under revolving credit facilities, all of which were undrawn, as of March 31, 2020 (in millions):



2013 Revolving Facility	$	750
2014 Revolving Facility	1,643
April 2016 Revolving Facility	450
Other Short-term Revolving Facility	400
Total	$	3,243