Debt and Financing Arrangements (Tables)

12 Months Ended

Dec. 31, 2019

Debt Disclosure [Abstract]

Long-term debt

At December 31, 2019 and 2018, long-term debt outstanding was as follows (in thousands): 

	2019			2018
Debentures:
7.08% due 2026	$	7,500		$	7,500
7.25% due 2026	200,000			200,000
Total debentures	207,500			207,500
Notes:
7.85% due 2026	1,000,000			1,000,000
4.0% due 2028	400,000			400,000
5.4% due 2041	375,000			375,000
4.45% due 2042	400,000			400,000
4.6% due 2048	600,000			600,000
Total notes	2,775,000			2,775,000
Other financing obligations	1,115,980			1,067,286
Total long-term debt, including current portion	4,098,480			4,049,786
Unamortized debt issuance costs	(22,876		)	(24,242		)
Unamortized debt premium and discount, net	(10,634		)	(11,137		)
Long-term debt due within one year	(20,180		)	(15,419		)
Total long-term debt	$	4,044,790		$	3,998,988

Maturities of long-term debt

Aggregate minimum maturities (face value) applicable to long-term debt outstanding at December 31, 2019, for the next five years, are as follows (in thousands): 

2020:     Other financing obligations	$	20,180
2021:     Other financing obligations	$	22,102
2022:     Other financing obligations	$	24,207
2023:     Other financing obligations	$	26,511
2024:     Other financing obligations	$	29,036

Future minimum lease payments

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