Long-term Debt (Tables)

6 Months Ended

Jun. 30, 2020

Debt Disclosure [Abstract]

Schedule of Long-term Debt

Long-term debt consists of the following (in millions):

	June 30, 2020		December 31, 2019
Amounts borrowed (Credit Facility)	$	225.0	$	324.8
Obligations under finance leases	76.5		57.3
Total long-term debt	$	301.5	$	382.1

Amounts related to the Credit Facility are as follows (in millions, except interest rate data):

	June 30, 2020		December 31, 2019
Amounts borrowed, net	$	225.0	$	324.8
Outstanding letters of credit	19.4		16.7
Amounts available to borrow(1)	494.4		341.7
Unamortized debt issuance costs	1.3		1.7

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(1) Subject to borrowing base limitations, and excluding expansion feature of $200 million.

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2020			2019			2020			2019
Average borrowings	$	354.3		$	235.2		$	345.3		$	256.3
Range of borrowings	225.0 - 451.0			141.7 - 330.6			151.5 - 499.3			141.7 - 390.0
Unused Credit Facility and letter of credit participation fees(1)	0.3			0.3			0.6			0.7
Amortization of debt issuance costs(1)	0.2			0.2			0.4			0.4
Weighted-average interest rate(2)	1.4		%	3.7		%	2.1		%	3.7		%

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(1) Included in interest expense, net.

(2) Calculated based on the daily cost of borrowing, reflecting a blend of prime and LIBOR rates.