NONCONTROLLING INTERESTS (Details) $ / shares in Units, $ in Millions	Mar. 20, 2019 CAD ($) $ / shares
Noncontrolling Interest [Line Items]
Dividends	$ 300
Noncontrolling interest, period decrease	300
Preferred share investment
Noncontrolling Interest [Line Items]
Payments of Dividends	$ 4
Preferred share investment \| Preference Shares, Series 7
Noncontrolling Interest [Line Items]
Preferred stock, dividend rate, percentage	5.50%
Preferred stock, redemption price per share (in Canadian dollars per share) \| $ / shares	$ 25.00
Preferred share investment \| Preference Shares, Series 8
Noncontrolling Interest [Line Items]
Preferred stock, dividend rate, percentage	5.60%
Preferred stock, redemption price per share (in Canadian dollars per share) \| $ / shares	$ 25.00

Decrease in noncontrolling interest (for example, but not limited to, redeeming or purchasing the interests of noncontrolling shareholders, issuance of shares (interests) by the non-wholly owned subsidiary to the parent entity for other than cash, and a buyback of shares (interest) by the non-wholly owned subsidiary from the noncontrolling interests).

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