EARNINGS PER COMMON SHARE AND DIVIDENDS PER SHARE - Preference Share Redemption (Details) $ in Millions, $ in Millions	Jun. 01, 2022 USD ($)	Mar. 01, 2022 CAD ($)
Preference Shares, Series 17
Preferred stock outstanding, redemption amount		$ 750
Preference Shares, Series J
Preferred stock outstanding, redemption amount	$ 200

The redemption (or callable) amount of currently redeemable preferred stock. Includes amounts representing dividends not currently declared or paid but which will be payable under the redemption features or for which ultimate payment is solely within the control of the issuer.

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(b))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 11
-URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21564-112644

Name:	us-gaap_PreferredStockRedemptionAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant