Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2022

Fair Value Disclosures [Abstract]

Schedule of Company's Financial Assets (Liabilities) at Fair Value on Recurring Basis

The following table summarizes the basis used to measure the Company’s financial assets (liabilities) at fair value on a recurring basis in the balance sheets at December 31, 2022 and 2021:

	Basis of Fair Value Measurements
	Balance at December 31, 2022		Level 1		Level 2		Level 3
	(In millions)
Trading securities - mutual funds held in nonqualified SERP(1)	$	7.5	$	7.5	$	—	$	—

	Basis of Fair Value Measurements
	Balance at December 31, 2021		Level 1		Level 2		Level 3
	(In millions)
Trading securities - mutual funds held in nonqualified SERP(1)	$	11.6	$	11.6	$	—	$	—
Available-for-sale securities - equities(2)	45.3		45.3		—		—

(1) The Supplemental Executive Retirement Plan (“SERP”) investment assets are offset by a SERP liability which represents the Company’s obligation to distribute SERP funds to participants.

(2) At December 31, 2021, the securities were included in Other current assets on the Company’s Consolidated Balance Sheets and were available for overnight cash settlement, if necessary, to fund current operations. During the fourth quarter of 2022, the Company sold the securities for €39.9 million (or $39.7 million) which were originally purchased for €40.0 million (or $45.3 million). The proceeds from the sale of these securities were used to contribute cash for the acquisition of Muon Group.