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Share split (Details) | Aug. 18, 2020 item
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Share split |
Share split ratio | 0.05
Denominator considered for share split ratio | 20

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- Definition The denominator considered for share split ratio. + References No definition available. + Details
Name: | exc_DenominatorConsideredForShareSplitRatio
Namespace Prefix: | exc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | exc_ShareSplitAbstract
Namespace Prefix: | exc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB TOPIC 4.C) -URI https://asc.fasb.org/extlink&oid=120397183&loc=d3e187143-122770 + Details
Name: | us-gaap_StockholdersEquityNoteStockSplitConversionRatio1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration