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Common Shares - Earnings per Common Share (Details) - CAD ($) $ / shares in Units, shares in Millions, $ in Millions		12 Months Ended
	Dec. 09, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Share Capital, Reserves And Other Equity Interest [Abstract]
Net earnings attributable to common shareholders		$ 177	$ 644	$ 4
Basic weighted average number of common shares outstanding (in shares)		302	276	271
Diluted weighted average number of common shares outstanding (in shares)		302	276	271
Net earnings (loss) per share attributable to common shareholders, basic (in CAD per share)		$ 0.59	$ 2.33	$ 0.01
Net earnings (loss) per share attributable to common shareholders, diluted (in CAD per share)		$ 0.59	$ 2.33	$ 0.01
Dividends declared per share (in CAD per share)	$ 0.06

X

- Definition

The weighted average number of ordinary shares outstanding plus the weighted average number of ordinary shares that would be issued on the conversion of all the dilutive potential ordinary shares into ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

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The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator) divided by the weighted average number of ordinary shares outstanding during the period (the denominator).

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The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator), divided by the weighted average number of ordinary shares outstanding during the period (the denominator), both adjusted for the effects of all dilutive potential ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

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The amount, per share, of dividends proposed or declared before financial statements were authorised for issue but not recognised as distribution to owners.

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The number of ordinary shares outstanding at the beginning of the period, adjusted by the number of ordinary shares bought back or issued during the period multiplied by a time-weighting factor.

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Share Capital, Reserves And Other Equity Interest [Abstract]

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