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STOCK-BASED COMPENSATION (Tables)

12 Months Ended

Dec. 31, 2020

Share-based Payment Arrangements [Abstract]

Other equity instruments activity

DSU and RSU Activity (Number of Units in Thousands)


			DSUs			Fair value			RSUs			Fair value
At January 1, 2019			764			$11.2			3,751			$36.0
Settled for cash			(404)			(6.5)			(2,131)			(30.7)
Forfeited			—			—			(1,157)			(15.8)
Granted			116			1.9			2,600			35.3
Credits for dividends			—			—			47			0.8
Change in value			—			2.2			—			15.9
At December 31, 2019			476			$8.8			3,110			$41.5
Settled for cash			—			—			(2,136)			(47.3)
Forfeited			—			—			(313)			(5.7)
Granted			85			2.0			1,923			35.2
Credits for dividends			—			—			39			0.9
Change in value			—			2.0			—			14.0
At December 31, 2020			561			$12.8			2,623			$38.6

Employee stock option activity


			2020						2019
			Shares			Average Price			Shares			Average Price
C$ options
At January 1			0.2			$10			0.3			$13

Exercised			(0.1)			10			(0.1)			16

At December 31			0.1			$10			0.2			$10
US$ options
At January 1			0.1			$32			0.5			$37

Cancelled/expired			(0.1)			32			(0.4)			39
At December 31			—			$—			0.1			$32

Stock options outstanding and exercisable


			Outstanding												Exercisable
Range of exercise prices			Shares			Average price			Average life (years)			Intrinsic value1 ($ millions)			Shares			Average price			Intrinsic value1 ($ millions)
C$ options
$9 - $17			0.1			$10			1.6			$1			0.1			$10			$1

1 Based on the closing market share price on December 31, 2020 of C$29.00.