Consolidated Statements of Equity - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Non-Controlling Interest [Member]
Beginning Balance at Dec. 31, 2020	$ 944.9	$ 0.3	$ 336.1	$ (93.3)	$ 758.6	$ (57.3)	$ 0.5
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	93.1				93.1
Dividend paid	(28.8)				(28.8)
Changes in cumulative translation adjustment, net of tax	(20.2)					(20.2)
Share of net income	0.1						0.1
Treasury stock re-issued	9.7		6.2	3.5
Treasury stock repurchased	(0.8)			(0.8)
Stock option compensation	4.4		4.4
Amortization of prior service cost, net of tax	0.2					0.2
Amortization of actuarial net losses, net of tax	2.2					2.2
Actuarial net gains/(losses) arising during the year	(28.2)					(28.2)
Ending Balance at Dec. 31, 2021	1,033.0	0.3	346.7	(90.6)	822.9	(46.9)	0.6
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	133.0				133.0
Dividend paid	(31.7)				(31.7)
Changes in cumulative translation adjustment, net of tax	(29.2)					(29.2)
Non-controlling interest investment	1.8						1.8
Treasury stock re-issued	1.7		0.7	1.0
Treasury stock repurchased	(5.8)			(5.8)
Stock option compensation	6.7		6.7
Amortization of prior service cost, net of tax	0.4					0.4
Amortization of actuarial net losses, net of tax	0.4					0.4
Actuarial net gains/(losses) arising during the year	(69.9)					(69.9)
Ending Balance at Dec. 31, 2022	1,040.4	0.3	354.1	(95.4)	924.2	(145.2)	2.4
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	139.1				139.1
Dividend paid	(35.1)				(35.1)
Changes in cumulative translation adjustment, net of tax	15.9					15.9
Share of net income	0.1						0.1
Treasury stock re-issued	1.1		(1.1)	2.2
Treasury stock repurchased	(1.1)			(1.1)
Stock option compensation	8.0		8.0
Amortization of prior service cost, net of tax	0.4					0.4
Amortization of actuarial net losses, net of tax	(1.7)					(1.7)
Actuarial net gains/(losses) arising during the year	(17.5)					(17.5)
Ending Balance at Dec. 31, 2023	$ 1,149.6	$ 0.3	$ 361.0	$ (94.3)	$ 1,028.2	$ (148.1)	$ 2.5