Segment Information (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Mar. 31, 2015
Segment Reporting Information [Abstract]
Net sales		$ 334.0	$ 377.3	$ 680.1	$ 769.8
Gross profit		$ 45.7	$ 56.7	$ 102.7	$ 124.4
Gross profit as % of sales		13.70%	15.00%	15.10%	16.20%
Operating (loss) income		$ (32.1)	$ 7.9	$ (20.5)	$ 32.0
Total assets		942.3		942.3		$ 931.6
Pension [Member]
Segment Reporting Information [Abstract]
Pension settlement loss	[1]	39.2	0.0	39.2	0.0
Selling, General and Administrative Expenses [Member] | Pension [Member]
Segment Reporting Information [Abstract]
Pension settlement loss		30.9		30.9
Cost of Sales [Member] | Pension [Member]
Segment Reporting Information [Abstract]
Pension settlement loss		8.3		8.3
Operating Segments [Member]
Segment Reporting Information [Abstract]
Net sales		338.8	381.7	689.7	778.6
Gross profit		$ 54.8	$ 56.5	$ 111.5	$ 123.8
Gross profit as % of sales		16.20%	14.80%	16.20%	15.90%
Operating (loss) income		$ 15.5	$ 15.3	$ 33.0	$ 45.7
Operating Segments [Member] | Americas [Member]
Segment Reporting Information [Abstract]
Net sales		144.2	170.8	303.3	347.6
Gross profit		$ 23.4	$ 24.5	$ 50.1	$ 56.1
Gross profit as % of sales		16.30%	14.40%	16.50%	16.10%
Operating (loss) income		$ 7.8	$ 8.2	$ 17.1	$ 24.1
Total assets		256.8		256.8		277.9
Operating Segments [Member] | Europe [Member]
Segment Reporting Information [Abstract]
Net sales		127.7	146.4	258.9	305.0
Gross profit		$ 14.7	$ 16.7	$ 29.8	$ 38.9
Gross profit as % of sales		11.50%	11.40%	11.50%	12.80%
Operating (loss) income		$ 5.0	$ 4.6	$ 10.7	$ 15.0
Total assets		304.5		304.5		283.1
Operating Segments [Member] | Asia [Member]
Segment Reporting Information [Abstract]
Net sales		18.1	19.0	37.4	39.8
Gross profit		$ 2.1	$ 2.1	$ 5.6	$ 5.7
Gross profit as % of sales		11.80%	11.10%	15.10%	14.30%
Operating (loss) income		$ (1.2)	$ (0.7)	$ (0.8)	$ 0.2
Total assets		86.1		86.1		92.4
Operating Segments [Member] | Building HVAC [Member]
Segment Reporting Information [Abstract]
Net sales		48.8	45.5	90.1	86.2
Gross profit		$ 14.6	$ 13.2	$ 26.0	$ 23.1
Gross profit as % of sales		29.90%	29.20%	28.90%	26.90%
Operating (loss) income		$ 3.9	$ 3.2	$ 6.0	$ 6.4
Total assets		150.8		150.8		131.4
Corporate and Eliminations [Member]
Segment Reporting Information [Abstract]
Net sales		(4.8)	(4.4)	(9.6)	(8.8)
Gross profit	[2]	$ (9.1)	$ 0.2	$ (8.8)	$ 0.6
Gross profit as % of sales	[2]	0.00%	0.00%	0.00%	0.00%
Operating (loss) income	[2]	$ (47.6)	$ (7.4)	$ (53.5)	$ (13.7)
Total assets		$ 144.1		$ 144.1		$ 146.8

[1] During September 2015, in an effort to reduce the size, volatility, mortality risk, and costs associated with its U.S. pension plans, the Company completed a voluntary lump-sum payout program offered to certain eligible former employees. Approximately 2,000 participants accepted the lump-sum settlement offer, and a total of $60.8 million was paid from pension plan assets, which reduced the Company's pension obligation by the same amount. In connection with this settlement, the Company remeasured the assets and liabilities of its U.S. pension plans using a discount rate of 4.4 percent. The remeasurement resulted in a $4.1 million increase in the plans' underfunded status and a $39.2 million non-cash charge in the second quarter of fiscal 2016, related to the accelerated recognition of unamortized actuarial losses previously recorded on the consolidated balance sheets within accumulated other comprehensive loss. The Company recorded $30.9 million and $8.3 million of the settlement loss to SG&A expenses and cost of sales, respectively, within the consolidated statement of operations.

[2] (a) During the second quarter of fiscal 2016, the Company recorded a pension settlement loss of $ 39.2 million at Corporate, within SG&A expenses ($30.9 million) and cost of sales ($ 8.3 million). See Note 4 for additional information.