Number of shares issued for each share of convertible preferred stock that is converted.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(27))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
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Name:	us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

Preference Shares (Details) - $ / shares		5 Months Ended	60 Months Ended
Preference Shares (Details) - $ / shares	Jun. 01, 2020	May 31, 2020	May 30, 2025
First Preference Shares, Series H
Conversion of Stock [Line Items]
Annual dividend (CAD per share)		$ 0.6250
First Preference Shares, Series H \| Forecast
Conversion of Stock [Line Items]
Annual dividend (CAD per share)			$ 0.45875
First Preference Shares, Series H
Conversion of Stock [Line Items]
Number of shares converted (in shares)	267,341
Number of shares issued for each share of convertible preferred stock	1
First Preference Shares, Series I
Conversion of Stock [Line Items]
Number of shares converted (in shares)	907,577
Number of shares issued for each share of convertible preferred stock	1