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, 2023	$ 641.3		$ 1,417.1	$ (177.9)	$ 7.8	$ 1,888.3
Net income			105.2		0.3	105.5
Other comprehensive income (loss)				(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
Balance at Dec. 31, 2024	642.7		1,614.9	(217.7)	7.7	2,047.6
Net income			100.9		0.2	101.1
Other comprehensive income (loss)				2.0	0.1	2.1
Stock issued	13.5					13.5
Stock purchased	(4.1)				(0.5)	(4.6)
Advance payments		1.4				1.4
Dividends declared			(9.8)			(9.8)
Balance at Mar. 31, 2025	$ 652.1	$ 1.4	$ 1,706.0	$ (215.7)	$ 7.5	$ 2,151.3