Fair Value of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2023

Fair Value Disclosures [Abstract]

Schedule of the fair value and carrying value of financial instruments

The following table presents the fair value and carrying value of these financial instruments as of December 31, 2023 and 2022:

	December 31, 2023				December 31, 2022
Millions	Fair Value		Carrying Value		Fair Value		Carrying Value
HG Global Senior Notes	$	158.7	$	146.9	$	155.7	$	146.5
Ark 2007 Subordinated Notes	$	30.5	$	30.0	$	28.4	$	30.0
Ark 2021 Subordinated Notes	$	171.8	$	155.5	$	163.1	$	153.7
Kudu Credit Facility	$	225.6	$	203.8	$	223.9	$	208.3
Other Operations debt	$	30.0	$	28.4	$	38.2	$	36.7