Fair Value of Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2023

Fair Value Disclosures [Abstract]

Summary 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 June 30, 2023 and December 31, 2022:

	June 30, 2023				December 31, 2022
Millions	Fair Value		Carrying Value		Fair Value		Carrying Value
HG Global Senior Notes	$	159.5	$	146.7	$	155.7	$	146.5
Ark 2007 Subordinated Notes	$	29.2	$	30.0	$	28.4	$	30.0
Ark 2021 Subordinated Notes	$	166.1	$	155.1	$	163.1	$	153.7
Kudu Credit Facility	$	224.9	$	203.7	$	223.9	$	208.3
Other Operations debt	$	33.0	$	30.6	$	38.2	$	36.7