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Stock-Based Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2023

Share-Based Payment Arrangement [Abstract]

DSU Plan Activity

The following table summarizes information related to DSUs.

			2023						2022
Number of units (thousands)
Beginning of year			224						183
Granted			40						33
Notional dividends reinvested			10						8
Paid out			(33)						—
End of year			241						224

PSU Plans Activity

The following table summarizes information related to PSUs.

			2023						2022
Number of units (thousands)
Beginning of year			1,790						1,898
Granted			722						580
Notional dividends reinvested			66						58
Paid out			(606)						(712)
Cancelled/forfeited			(30)						(34)
End of year			1,942						1,790
Additional information ($ millions)
Compensation expense recognized			45						25
Compensation expense unrecognized (1)			28						24
Cash payout			46						66
Accrued liability as at December 31 (2)			90						90
Aggregate intrinsic value as at December 31 (3)			118						114

(1)    Relates to unvested PSUs and is expected to be recognized over a weighted average period of two years

(2)    Recognized at the respective December 31st VWAP and included in accounts payable and other current liabilities and in other liabilities (Notes 13 and 16)

(3)    Relates to outstanding PSUs and reflects a weighted average contractual life of one year

RSU Plans Activity

The following table summarizes information related to RSUs.

			2023						2022
Number of units (thousands)
Beginning of year			977						1,060
Granted			416						331
Notional dividends reinvested			35						29
Paid out			(323)						(410)
Cancelled/forfeited			(26)						(33)
End of year			1,079						977
Additional information ($ millions)
Compensation expense recognized			21						16
Compensation expense unrecognized (1)			17						16
Cash payout			17						25
Accrued liability as at December 31 (2)			42						40
Aggregate intrinsic value as at December 31 (3)			59						56

(1)    Relates to unvested RSUs and is expected to be recognized over a weighted average period of two years

(2)    Recognized at the respective December 31st VWAP and included in accounts payable and other current liabilities and in long-term other liabilities (Notes 13 and 16)

(3)    Relates to outstanding RSUs and reflects a weighted average contractual life of one year

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- Definition

Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for stock awards granted to nonemployee directors that were outstanding at the beginning and end of the year, and the number of awards that were granted, exercised or converted, forfeited, and expired during the year.

+ References

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-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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- Definition

Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.

+ References

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-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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Tabular disclosure of the number and weighted-average grant date fair value for outstanding performance shares.

+ References

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-Name Accounting Standards Codification
-Section 50
-Subparagraph (c)
-Paragraph 2
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