Debt Obligations (Tables)

12 Months Ended

Dec. 31, 2022

Debt obligations, including finance lease obligations, as of the periods indicated consisted of the following (in millions):


	Years Ended December 31,
Infrastructure	2022		2021
3.25% Note due 2026	$	99.5	$	107.2
Line of Credit due 2024 (PRIME minus 0.85% and PRIME minus 1.10% as of December 31, 2022, and 2021, respectively)	107.7		30.4
4.00% Note due 2024	15.0		25.0
8.00% Note due 2024	18.7		19.6
11.00% Note due 2024	—		6.3
Obligations under finance leases	2.1		0.1
Total Infrastructure	$	243.0	$	188.6

Spectrum
8.50% Note due 2024	19.3		—
11.45% Note due 2024	50.4		—
8.50% Note due 2022	—		19.3
10.50% Note due 2022	—		32.9
Total Spectrum	$	69.7	$	52.2

Life Sciences
18.00% Note due 2023	10.8		—
Total Life Sciences	$	10.8	$	—

Non-Operating Corporate
8.50% Senior Secured Notes, due 2026	330.0		330.0
7.50% Convertible Senior Notes, due 2026	51.8		51.8
7.50% Convertible Senior Notes, due 2022	—		3.2
LIBOR plus 5.75% Line of Credit, due 2024	20.0		5.0
Total Non-Operating Corporate	$	401.8	$	390.0

Total outstanding principal	$	725.3	$	630.8
Unamortized issuance discount, issuance premium, and deferred financing costs	(10.9)		(4.5)
Less: current portion of debt obligations	(30.6)		(69.5)
Debt obligations	$	683.8	$	556.8

Aggregate finance lease and debt payments, including interest, as of December 31, 2022, were as follows (in millions):


	Finance Leases		Debt		Total
2023	$	1.8	$	74.9	$	76.7
2024	0.3		274.5		274.8
2025	0.1		41.8		41.9
2026	—		469.8		469.8
2027	—		—		—
Thereafter	—		—		—
Total minimum principal and interest payments	2.2		861.0		863.2
Less: Amount representing interest	(0.1)		(137.8)		(137.9)
Total aggregate finance lease and debt payments	$	2.1	$	723.2	$	725.3