SHARE CAPITAL - Dividends (Details) - CAD ($)
$ / shares in Units, $ in Millions

12 Months Ended

Feb. 03, 2020

Jan. 31, 2020

Mar. 16, 2019

Dec. 31, 2019

Dec. 31, 2018

Common share capital

Disclosure of classes of share capital [line items]

Dividends paid

$ 1,213

$ 1,131

Dividends paid per share (in CAD per share)

$ 2.36

$ 2.24

Preferred share capital

Disclosure of classes of share capital [line items]

Dividends paid

$ 126

$ 122

Series 1 preferred share

Disclosure of classes of share capital [line items]

Dividends paid

$ 12

$ 11

Dividends paid per share (in CAD per share)

$ 1.23

$ 1.06

Series 3 preferred share

Disclosure of classes of share capital [line items]

Dividends paid

$ 7

Dividends paid per share (in CAD per share)

$ 1.13

$ 1.18

Series 5 preferred share

Disclosure of classes of share capital [line items]

Dividends paid

$ 12

Dividends paid per share (in CAD per share)

$ 1.19

$ 1.25

Series 7 preferred share

Disclosure of classes of share capital [line items]

Dividends paid

$ 11

Dividends paid per share (in CAD per share)

$ 1.12

$ 1.13

Series 9 preferred share

Disclosure of classes of share capital [line items]

Dividends paid

$ 11

Dividends paid per share (in CAD per share)

$ 1.19

Series 11 preferred share

Disclosure of classes of share capital [line items]

Dividends paid

$ 10

Dividends paid per share (in CAD per share)

$ 1.44

Series 13 preferred share

Disclosure of classes of share capital [line items]

Dividends paid

$ 14

Dividends paid per share (in CAD per share)

$ 1.44

Series 15 preferred share

Disclosure of classes of share capital [line items]

Dividends paid

$ 9

Dividends paid per share (in CAD per share)

$ 1.12

Series 17 preferred share

Disclosure of classes of share capital [line items]

Dividends paid

$ 7

$ 8

Dividends paid per share (in CAD per share)

$ 1.22

$ 1.25

Series 19 preferred share

Disclosure of classes of share capital [line items]

Dividends paid

$ 10

Dividends paid per share (in CAD per share)

$ 1.25

Series 21 preferred share

Disclosure of classes of share capital [line items]

Dividends paid

$ 20

$ 19

Dividends paid per share (in CAD per share)

$ 1.23

$ 1.20

Series 23 preference share

Disclosure of classes of share capital [line items]

Dividends paid

$ 2

$ 0

Dividends paid per share (in CAD per share)

$ 0.16

Series 25 preference share

Disclosure of classes of share capital [line items]

Dividends paid

$ 1

$ 0

Dividends paid per share (in CAD per share)

$ 0.16

Major preference share transactions | Series 1 preferred share

Disclosure of classes of share capital [line items]

Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners per share (in CAD per share)

$ 0.306625

Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners

$ 3

Major preference share transactions | Series 3 preferred share

Disclosure of classes of share capital [line items]

Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners per share (in CAD per share)

$ 0.279875

Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners

$ 2

Major preference share transactions | Series 5 preferred share

Disclosure of classes of share capital [line items]

Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners per share (in CAD per share)

$ 0.285813

Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners

$ 3

Major preference share transactions | Series 7 preferred share

Disclosure of classes of share capital [line items]

Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners per share (in CAD per share)

$ 0.273750

Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners

$ 3

Major preference share transactions | Series 9 preferred share

Disclosure of classes of share capital [line items]

Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners per share (in CAD per share)

$ 0.296875

Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners

$ 3

Major preference share transactions | Series 11 preferred share

Disclosure of classes of share capital [line items]

Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners per share (in CAD per share)

$ 0.359375

Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners

$ 2

Major preference share transactions | Series 13 preferred share

Disclosure of classes of share capital [line items]

Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners per share (in CAD per share)

$ 0.359375

Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners

$ 4

Major preference share transactions | Series 15 preferred share

Disclosure of classes of share capital [line items]

Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners per share (in CAD per share)

$ 0.279000

Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners

$ 2

Major preference share transactions | Series 17 preferred share

Disclosure of classes of share capital [line items]

Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners per share (in CAD per share)

$ 0.301313

Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners

$ 2

Major preference share transactions | Series 19 preferred share

Disclosure of classes of share capital [line items]

Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners per share (in CAD per share)

$ 0.312500

Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners

$ 3

Major preference share transactions | Series 21 preferred share

Disclosure of classes of share capital [line items]

Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners per share (in CAD per share)

$ 0.306250

Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners

$ 5

Major preference share transactions | Series 23 preference share

Disclosure of classes of share capital [line items]

Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners per share (in CAD per share)

$ 0.328125

Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners

$ 4

Major preference share transactions | Series 25 preference share

Disclosure of classes of share capital [line items]

Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners per share (in CAD per share)

$ 0.325000

Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners

$ 3