Condensed Consolidated Statements Of Changes In Shareholders’ Equity - USD ($) $ in Millions	Common Stock [Member]	Common Stock Subscribed, Unissued [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Noncontrolling Interests [Member]	Total
Balance at Dec. 31, 2022	$ 531.8		$ 1,141.0	$ (152.8)	$ 5.6	$ 1,525.6
Net income			124.8		0.2	125.0
Other comprehensive (loss) income				0.3		0.3
Stock issued	11.6					11.6
Stock purchased	(5.4)				(0.2)	(5.6)
Advance payments		$ 1.2				1.2
Dividends declared			(8.0)			(8.0)
Balance at Mar. 31, 2023	538.0	1.2	1,257.8	(152.5)	5.6	1,650.1
Balance at Dec. 31, 2023	641.3		1,417.1	(177.9)	7.8	1,888.3
Net income			105.2		0.3	105.5
Other comprehensive (loss) income				(2.9)	(0.1)	(3.0)
Stock issued	13.5					13.5
Stock purchased	(5.4)				(0.2)	(5.6)
Advance payments		0.7				0.7
Dividends declared			(9.7)			(9.7)
Balance at Mar. 31, 2024	$ 649.4	$ 0.7	$ 1,512.6	$ (180.8)	$ 7.8	$ 1,989.7