CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) shares in Millions, $ in Millions	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock, at Cost [Member]	Non-controlling Interest [Member]	Total
Balance at Mar. 31, 2020	$ 33.3	$ 245.1	$ 469.9	$ (223.3)	$ (37.1)	$ 5.7	$ 493.6
Balance (in shares) at Mar. 31, 2020	53.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) earnings	$ 0.0	0.0	(8.6)	0.0	0.0	0.2	(8.4)
Other comprehensive income (loss)	0.0	0.0	0.0	7.5	0.0	0.1	7.6
Stock options and awards	$ 0.2	(0.2)	0.0	0.0	0.0	0.0	0.0
Stock options and awards (in shares)	0.3
Purchase of treasury stock	$ 0.0	0.0	0.0	0.0	(0.8)	0.0	(0.8)
Stock-based compensation expense	0.0	0.7	0.0	0.0	0.0	0.0	0.7
Balance at Jun. 30, 2020	$ 33.5	245.6	461.3	(215.8)	(37.9)	6.0	492.7
Balance (in shares) at Jun. 30, 2020	53.7
Balance at Mar. 31, 2020	$ 33.3	245.1	469.9	(223.3)	(37.1)	5.7	493.6
Balance (in shares) at Mar. 31, 2020	53.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) earnings							(194.9)
Other comprehensive income (loss)							46.4
Balance at Dec. 31, 2020	$ 33.6	249.1	274.2	(177.5)	(37.9)	7.1	348.6
Balance (in shares) at Dec. 31, 2020	53.8
Balance at Jun. 30, 2020	$ 33.5	245.6	461.3	(215.8)	(37.9)	6.0	492.7
Balance (in shares) at Jun. 30, 2020	53.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) earnings	$ 0.0	0.0	8.6	0.0	0.0	0.3	8.9
Other comprehensive income (loss)	0.0	0.0	0.0	19.0	0.0	0.1	19.1
Stock options and awards	$ 0.1	0.0	0.0	0.0	0.0	0.0	0.1
Stock options and awards (in shares)	0.1
Stock-based compensation expense	$ 0.0	1.4	0.0	0.0	0.0	0.0	1.4
Balance at Sep. 30, 2020	$ 33.6	247.0	469.9	(196.8)	(37.9)	6.4	522.2
Balance (in shares) at Sep. 30, 2020	53.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) earnings	$ 0.0	0.0	(195.7)	0.0	0.0	0.3	(195.4)
Other comprehensive income (loss)	0.0	0.0	0.0	19.3	0.0	0.4	19.7
Stock-based compensation expense	0.0	2.1	0.0	0.0	0.0	0.0	2.1
Balance at Dec. 31, 2020	$ 33.6	249.1	274.2	(177.5)	(37.9)	7.1	348.6
Balance (in shares) at Dec. 31, 2020	53.8
Balance at Mar. 31, 2021	$ 33.9	255.0	259.2	(161.2)	(38.2)	7.4	$ 356.1
Balance (in shares) at Mar. 31, 2021	54.3						54.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) earnings	$ 0.0	0.0	2.3	0.0	0.0	0.5	$ 2.8
Other comprehensive income (loss)	0.0	0.0	0.0	8.0	0.0	0.2	8.2
Stock options and awards	$ 0.1	0.7	0.0	0.0	0.0	0.0	0.8
Stock options and awards (in shares)	0.2
Purchase of treasury stock	$ 0.0	0.0	0.0	0.0	(1.0)	0.0	(1.0)
Stock-based compensation expense	0.0	1.2	0.0	0.0	0.0	0.0	1.2
Dividend paid to noncontrolling interest	0.0	0.0	0.0	0.0	0.0	(0.9)	(0.9)
Balance at Jun. 30, 2021	$ 34.0	256.9	261.5	(153.2)	(39.2)	7.2	367.2
Balance (in shares) at Jun. 30, 2021	54.5
Balance at Mar. 31, 2021	$ 33.9	255.0	259.2	(161.2)	(38.2)	7.4	$ 356.1
Balance (in shares) at Mar. 31, 2021	54.3						54.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) earnings							$ 77.8
Other comprehensive income (loss)							0.3
Balance at Dec. 31, 2021	$ 34.2	260.5	336.0	(160.8)	(39.7)	7.4	$ 437.6
Balance (in shares) at Dec. 31, 2021	54.6						54.6
Balance at Jun. 30, 2021	$ 34.0	256.9	261.5	(153.2)	(39.2)	7.2	$ 367.2
Balance (in shares) at Jun. 30, 2021	54.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) earnings	$ 0.0	0.0	0.4	0.0	0.0	0.2	0.6
Other comprehensive income (loss)	0.0	0.0	0.0	(6.0)	0.0	(0.4)	(6.4)
Stock options and awards	$ 0.1	0.1	0.0	0.0	0.0	0.0	0.2
Stock options and awards (in shares)	0.0
Stock-based compensation expense	$ 0.0	2.4	0.0	0.0	0.0	0.0	2.4
Balance at Sep. 30, 2021	$ 34.1	259.4	261.9	(159.2)	(39.2)	7.0	364.0
Balance (in shares) at Sep. 30, 2021	54.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) earnings	$ 0.0	0.0	74.1	0.0	0.0	0.3	74.4
Other comprehensive income (loss)	0.0	0.0	0.0	(1.6)	0.0	0.1	(1.5)
Stock options and awards	$ 0.1	0.0	0.0	0.0	0.0	0.0	0.1
Stock options and awards (in shares)	0.1
Purchase of treasury stock	$ 0.0	0.0	0.0	0.0	(0.5)	0.0	(0.5)
Stock-based compensation expense	0.0	1.1	0.0	0.0	0.0	0.0	1.1
Balance at Dec. 31, 2021	$ 34.2	$ 260.5	$ 336.0	$ (160.8)	$ (39.7)	$ 7.4	$ 437.6
Balance (in shares) at Dec. 31, 2021	54.6						54.6