| Earnings Per Share Attributable to Matthews' Shareholders | 3 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Dec. 31, 2019 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Earnings Per Share [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Earnings Per Share Attributable to Matthews' Shareholders | Earnings Per Share Attributable to Matthews' Shareholders The information used to compute (loss) earnings per share attributable to Matthews' common shareholders was as follows: 
 
Anti-dilutive securities excluded from the dilution calculation were insignificant for the three months ended December 31, 2019 and 2018.
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- References No definition available. 
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- Definition The entire disclosure for earnings per share. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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