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Business Acquisitions and Investments (Details) $ in Millions	1 Months Ended	12 Months Ended
	Jan. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2018	Mar. 31, 2018 USD ($)	Mar. 31, 2018 CNY (¥)	Nov. 30, 2017 USD ($)	Apr. 30, 2014 USD ($)
Foshan GWO YNG SMP Vehicle Climate Control & Cooling Products Co. Ltd. [Member]
Business Combination, Description [Abstract]
Percentage of equity interest acquired			65.00%	15.00%	15.00%		50.00%
Equity in joint ventures				$ 4.2	¥ 26,475,583		$ 14.0
Foshan Guangdong Automotive Air Conditioning Co., Ltd [Member]
Business Combination, Description [Abstract]
Percentage of equity interest acquired						50.00%
Equity in joint ventures						$ 12.5
Purchase price	$ 5.7	$ 6.8

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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