Segment Information (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Mar. 31, 2016
Segment Reporting Information [Abstract]
Net sales		$ 349.8	$ 328.7	$ 1,014.7	$ 1,008.8
Gross profit		$ 58.7	$ 58.6	$ 168.4	$ 161.3
Gross profit (% of sales)		16.80%	17.80%	16.60%	16.00%
Operating income		$ 6.0	$ 13.7	$ 19.2	$ (6.8)
Total assets		1,392.9		1,392.9		$ 920.9
Pension [Member]
Segment Reporting Information [Abstract]
Pension settlement loss	[1]	0.0	(1.1)	0.0	(40.3)
Cost of Sales [Member] | Pension [Member]
Segment Reporting Information [Abstract]
Pension settlement loss				(8.5)	(8.5)
Selling, General and Administrative Expenses [Member] | Luvata HTS [Member]
Segment Reporting Information [Abstract]
Acquisition and integration related costs		7.2		11.6
Selling, General and Administrative Expenses [Member] | Pension [Member]
Segment Reporting Information [Abstract]
Pension settlement loss				(31.8)	(31.8)
Operating Segments [Member]
Segment Reporting Information [Abstract]
Net sales		353.7	332.8	1,024.8	1,022.5
Gross profit		$ 61.5	$ 59.8	$ 173.6	$ 171.3
Gross profit (% of sales)		17.50%	18.00%	16.90%	16.80%
Operating income		$ 22.7	$ 21.9	$ 58.2	$ 54.9
Operating Segments [Member] | Americas [Member]
Segment Reporting Information [Abstract]
Net sales		123.4	137.1	389.4	440.4
Gross profit		$ 18.3	$ 22.7	$ 59.2	$ 72.8
Gross profit (% of sales)		14.80%	16.50%	15.20%	16.50%
Operating income		$ 5.4	$ 7.7	$ 13.3	$ 24.8
Total assets		263.3		263.3		267.2
Operating Segments [Member] | Europe [Member]
Segment Reporting Information [Abstract]
Net sales		119.8	126.1	389.7	385.0
Gross profit		$ 18.5	$ 17.2	$ 59.8	$ 47.0
Gross profit (% of sales)		15.40%	13.70%	15.30%	12.20%
Operating income		$ 8.3	$ 7.6	$ 30.0	$ 18.3
Total assets		247.8		247.8		301.9
Operating Segments [Member] | Asia [Member]
Segment Reporting Information [Abstract]
Net sales		28.6	18.7	78.2	56.1
Gross profit		$ 5.0	$ 2.6	$ 13.1	$ 8.2
Gross profit (% of sales)		17.60%	13.90%	16.70%	14.70%
Operating income		$ 2.6	$ (0.1)	$ 4.9	$ (0.9)
Total assets		103.5		103.5		104.0
Operating Segments [Member] | BHVAC [Member]
Segment Reporting Information [Abstract]
Net sales		47.2	50.9	132.8	141.0
Gross profit		$ 15.3	$ 17.3	$ 37.1	$ 43.3
Gross profit (% of sales)		32.40%	34.00%	27.90%	30.80%
Operating income		$ 6.7	$ 6.7	$ 10.3	$ 12.7
Total assets		88.8		88.8		99.0
Operating Segments [Member] | CIS [Member]
Segment Reporting Information [Abstract]
Net sales		34.7	0.0	34.7	0.0
Gross profit		$ 4.4	$ 0.0	$ 4.4	$ 0.0
Gross profit (% of sales)		12.70%	0.00%	12.70%	0.00%
Operating income		$ (0.3)	$ 0.0	$ (0.3)	$ 0.0
Total assets		560.7		560.7		0.0
Corporate and Eliminations [Member]
Segment Reporting Information [Abstract]
Net sales		(3.9)	(4.1)	(10.1)	(13.7)
Gross profit	[2]	$ (2.8)	$ (1.2)	$ (5.2)	$ (10.0)
Gross profit (% of sales)	[2]	0.00%	0.00%	0.00%	0.00%
Operating income	[2]	$ (16.7)	$ (8.2)	$ (39.0)	$ (61.7)
Total assets		128.8		$ 128.8		$ 148.8
Corporate and Eliminations [Member] | Cost of Sales [Member]
Segment Reporting Information [Abstract]
Inventory step-up cost		$ 2.9

[1] During fiscal 2016, in an effort to reduce the size, volatility, mortality risk, and costs associated with its U.S. pension plans, the Company offered a voluntary lump-sum payout program to certain eligible former employees. Approximately 2,000 participants accepted the lump-sum settlement offer and a total of $62.4 million was paid from pension plan assets during the nine months ended December 31, 2015, which reduced the Company's pension obligation by the same amount. In connection with these lump-sum payouts, the Company recorded $40.3 million of non-cash settlement losses related to the accelerated recognition of unamortized actuarial losses previously recorded on the consolidated balance sheets within accumulated other comprehensive loss. The Company recorded $31.8 million and $8.5 million of the settlement losses as SG&A expenses and cost of sales, respectively, within the consolidated statement of operations.

[2] During the three and nine months ended December 31, 2016, the Company recorded $7.2 million and $11.6 million, respectively, of costs incurred directly related to the acquisition and integration of Luvata HTS within SG&A expenses at Corporate. In addition, as a result of purchase accounting for the Luvata HTS acquisition, the Company wrote up acquired inventory to its estimated fair value and is charging the write-up to cost of sales as the underlying inventory is sold. During the third quarter of fiscal 2017, the Company recorded $2.9 million in cost of sales related to this inventory step-up at Corporate, as the impact of this purchase accounting adjustment is excluded from the Company's measure of segment operating performance. During the nine months ended December 31, 2015, the Company recorded a pension settlement loss of $40.3 million at Corporate, within SG&A expenses ($31.8 million) and cost of sales ($8.5 million). See Note 4 for additional information about the Company's pension plans.