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v3.19.3

General (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Mar. 31, 2019 | Mar. 31, 2018
Leases [Abstract] |  |  |  |  |
Right-of-use assets | $ 64.7 |  | $ 64.7 | $ 61.3 |
Operating lease liabilities, Other current liabilities | 10.1 |  | 10.1 |  |
Operating lease liabilities, Other noncurrent liabilities | 53.1 |  | 53.1 |  |
Operating leases, right-of-use liabilities | 63.2 |  | 63.2 |  |
New Accounting Guidance Adopted [Abstract] |  |  |  |  |
Retained earnings | 475.4 |  | 475.4 | 472.1 |
Real Estate Leases [Member] |  |  |  |  |
Leases [Abstract] |  |  |  |  |
Right-of-use assets |  |  |  | 61.3 |
Operating lease liabilities, Other current liabilities |  |  |  | 12.4 |
Operating lease liabilities, Other noncurrent liabilities |  |  |  | 48.9 |
Build to Suit Arrangements [Member] |  |  |  |  |
Leases [Abstract] |  |  |  |  |
Right-of-use assets |  |  |  | $ 5.2 |
Operating leases, right-of-use liabilities | $ 5.2 |  | $ 5.2 |  |
AIAC Air Conditioning South Africa (Pty) Ltd [Member] |  |  |  |  |
Sale of Business [Abstract] |  |  |  |  |
Selling price |  | $ 0.5 |  |  |
Gain (loss) on sale of business |  | (1.7) |  |  |
Gain (loss) on write-off of accumulated foreign currency translation |  | (0.8) |  |  |
AIAC Air Conditioning South Africa (Pty) Ltd [Member] | Maximum [Member] |  |  |  |  |
Sale of Business [Abstract] |  |  |  |  |
Annual net sales attributable to disposed business |  | $ 2.0 |  |  |
Nikkei Heat Exchanger Company, Ltd [Member] |  |  |  |  |
Sale of Business [Abstract] |  |  |  |  |
Ownership percentage | 50.00% |  | 50.00% |  |
Selling price | $ 3.8 |  | $ 3.8 |  |
Gain (loss) on sale of business | 0.1 |  | $ 0.1 |  |
Gain (loss) on write-off of accumulated foreign currency translation | $ 0.6 |  |  |  |
ASU 2014-09 [Member] |  |  |  |  |
New Accounting Guidance Adopted [Abstract] |  |  |  |  |
Retained earnings |  |  |  |  | $ 0.7
ASU 2016-16 [Member] |  |  |  |  |
New Accounting Guidance Adopted [Abstract] |  |  |  |  |
Retained earnings |  |  |  |  | $ (8.3)

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