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Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2018

Share based compensation

Share-Based compensation expense

($ millions)		2018		2017
Equity-settled plans		46		48
Cash-settled plans		181		334
Total share-based compensation expense		227		382

Summary of liability recognized for share-based compensation

($ millions)		2018		2017
Current liability		286		344
Long-term liability (note 20)		259		361
Total Liability		545		705

Weighted average fair value of options granted during the period and the weighted average assumptions used in their determination

		2018		2017
Annual dividend per share		$ 1.44		$ 1.28
Risk-free interest rate		2.03%		1.09%
Expected life		5 years		5 years
Expected volatility		24%		25%
Weighted average fair value per option		$ 6.73		$ 6.42

Summary of stock option plans

		2018				2017
		Number (thousands)		Weighted Average Exercise Price ($)		Number (thousands)		Weighted Average Exercise Price ($)
Outstanding, beginning of year		31 110		36.96		31 442		35.98
Granted		7 231		43.19		7 401		42.04
Exercised for cash payment		—		—		(6	)	32.00
Exercised as options for common shares		(7 927	)	35.95		(6 223	)	36.65
Forfeited/expired		(1 479	)	47.88		(1 504	)	42.21
Outstanding, end of year		28 935		38.25		31 110		36.96
Exercisable, end of year		15 374		36.10		17 363		36.53

Exercise price ranges and weighted average remaining contractual lives

		Outstanding						Exercisable
Exercise Prices ($)		Number (thousands)		Weighted Average Remaining Contractual Life (years)		Weighted Average Exercise Price ($)		Number (thousands)		Weighted Average Exercise Price ($)
24.50-34.99		7 821		3		30.90		5 589		31.16
35.00-39.99		7 214		3		37.74		7 195		37.74
40.00-44.99		13 714		6		42.53		2 590		42.19
45.00-49.99		58		7		47.82		—		—
50.00-54.27		128		7		52.40		—		—
Total		28 935		4		38.25		15 374		36.10

Summary of common shares available for granting future options

(thousands)		2018		2017
		21 929		28 972

Summary of share units and stock appreciation rights

(thousands)			PSU		RSU		DSU
Outstanding, December 31, 2016			2 413		18 158		1 218
	Granted		1 570		5 009		202
	Redeemed for cash		(1 663	)	(6 354	)	(118	)
	Forfeited/expired		(53	)	(741	)	—
Outstanding, December 31, 2017			2 267		16 072		1 302
	Granted		1 553		4 796		192
	Redeemed for cash		(1 623	)	(5 962	)	(189	)
	Forfeited/expired		—		(314	)	—
Outstanding, December 31, 2018			2 197		14 592		1 305

Stock Appreciation Rights (SARs)

Share based compensation

Summary of share units and stock appreciation rights

		2018				2017
		Number (thousands)		Weighted Average Exercise Price ($)		Number (thousands)		Weighted Average Exercise Price ($)
Outstanding, beginning of year		387		36.38		485		34.90
Granted		108		43.09		107		42.05
Exercised		(126	)	35.65		(176	)	35.59
Forfeited/expired		(6	)	38.36		(29	)	37.32
Outstanding, end of year		363		38.60		387		36.38
Exercisable, end of year		170		36.57		162		35.39

X

- Definition

The disclosure of information about indirect, by reference to the fair value of the equity instruments granted, measurement of the fair value of goods or services received as consideration for the entity's share options.

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