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v3.19.3.a.u2

General (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Mar. 31, 2019 | Mar. 31, 2018
Sale of Business [Abstract] |  |  |  |  |  |  |  |
Gain (loss) on sale of assets | $ 0.8 |  | $ 0.0 |  | $ 0.8 | $ (1.7) |  |
Leases [Abstract] |  |  |  |  |  |  |  |
Right-of-use assets | 64.3 |  |  |  | 64.3 |  | $ 61.3 |
Operating lease liabilities, Other current liabilities | 11.1 |  |  |  | 11.1 |  |  |
Operating lease liabilities, Other noncurrent liabilities | 52.9 |  |  |  | 52.9 |  |  |
Operating leases, right-of-use liabilities | 64.0 |  |  |  | 64.0 |  |  |
New Accounting Guidance Adopted [Abstract] |  |  |  |  |  |  |  |
Retained earnings | 476.6 |  |  |  | 476.6 |  | 472.1 |
Vehicular Thermal Solutions [Member] |  |  |  |  |  |  |  |
Sale of Business [Abstract] |  |  |  |  |  |  |  |
Gain (loss) on sale of assets | 0.8 |  |  |  |  |  |  |
Selling price | $ 6.0 |  |  |  | 6.0 |  |  |
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 |
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% |  |  |  |  |  |
Selling price |  | $ 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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