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Subsequent Event	12 Months Ended
	Dec. 31, 2018
Events After Reporting Period [Abstract]
Subsequent Event	Subsequent Event: In February 2019, the Corporation made a committed capital contribution of $14,506,000 (RMB 98,000,000 equivalent) to Weichai Ballard JV (note 12).

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- Definition

Events After Reporting Period [Abstract]

+ References

No definition available.

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- Definition

The entire disclosure for events after the reporting period.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-IssueDate 2017-01-01
-Section Disclosure
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-URIDate 2017-03-09

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