CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (unaudited) - USD ($) $ in Millions	Common stock	Additional paid-in capital	Retained deficit	Accumulated other comprehensive loss	Treasury stock	Total
Beginning Balance at Dec. 31, 2020	$ 1.2	$ 1,395.3	$ (151.8)	$ (448.2)		$ 796.5
Net income			45.3			45.3
Other comprehensive income, net of tax				10.9		10.9
Issuance of common stock		0.1				0.1
Dividends paid			(41.6)			(41.6)
Ending Balance at Jun. 30, 2021	1.2	1,395.4	(148.1)	(437.3)		811.2
Beginning Balance at Mar. 31, 2021	1.2	1,395.3	(153.0)	(442.6)		800.9
Net income			25.7			25.7
Other comprehensive income, net of tax				5.3		5.3
Issuance of common stock		0.1				0.1
Dividends paid			(20.8)			(20.8)
Ending Balance at Jun. 30, 2021	1.2	1,395.4	(148.1)	(437.3)		811.2
Beginning Balance at Dec. 31, 2021	1.2	1,395.4	(122.1)	(404.1)	$ (0.2)	870.2
Ending Balance at Mar. 31, 2022	1.2	1,395.2	(86.5)	(395.2)	(1.1)	913.6
Beginning Balance at Dec. 31, 2021	1.2	1,395.4	(122.1)	(404.1)	(0.2)	870.2
Net income			103.4			103.4
Other comprehensive income, net of tax				(25.1)		(25.1)
Issuance of common stock		0.1				0.1
Dividends paid			(43.9)			(43.9)
Treasury stock acquired					(1.1)	(1.1)
Treasury stock retired		(1.3)			1.3
Ending Balance at Jun. 30, 2022	1.2	1,394.2	(62.6)	(429.2)		903.6
Beginning Balance at Mar. 31, 2022	1.2	1,395.2	(86.5)	(395.2)	(1.1)	913.6
Net income			45.9			45.9
Other comprehensive income, net of tax				(34.0)		(34.0)
Issuance of common stock		0.1				0.1
Dividends paid			(22.0)			(22.0)
Treasury stock retired		(1.1)			$ 1.1
Ending Balance at Jun. 30, 2022	$ 1.2	$ 1,394.2	$ (62.6)	$ (429.2)		$ 903.6