Long-term Debt, Short-term Borrowings and Finance Lease Obligations (Tables)

3 Months Ended

Mar. 31, 2020

The carrying amounts and estimated fair values of our long-term debt, net of debt acquisition costs, at March 31, 2020 and December 31, 2019 were as follows (in millions):



	March 31, 2020				December 31, 2019
	Carrying Value		Estimated Fair Value		Carrying Value		Estimated Fair Value
Public Debt
Fixed rate special facility bonds, due through 2036	$	42	$	39	$	42	$	46
Fixed rate enhanced equipment notes:
Series AA, due through 2032	581		409		581		586
Series A, due through 2028	181		144		181		186
Non-Public Debt
Fixed rate enhanced equipment notes, due through 2023	125		124		133		141
Floating rate equipment notes, due through 2028	187		169		201		207
Fixed rate equipment notes, due through 2028	1,035		1,001		1,107		1,201
Total⁽¹⁾	$	2,151	$	1,886	$	2,245	$	2,367

(1) Total excludes finance lease obligations of $83 million and $89 million at March 31, 2020 and December 31, 2019, respectively.