LOSS PER SHARE (Details) - CAD ($) $ / shares in Units, $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022
LOSS PER SHARE
Net income (loss) attributable to GFL Environmental Inc.	$ 45.4	$ (311.8)
Net loss from discontinued operations		(127.9)
Amounts attributable to preferred shareholders	92.2	83.0
Adjusted net loss from continuing operations	$ (46.8)	$ (266.9)
Weighted and diluted weighted average number of shares outstanding	369,656,237	367,170,911
Basic and diluted loss per share
Basic loss per share continuing operations	$ (0.13)	$ (0.73)
Diluted loss per share continuing operations	(0.13)	(0.73)
Basic loss per share discontinued operations	0	(0.35)
Diluted loss per share discontinued operations		(0.35)
Total operations basic	(0.13)	(1.08)
Total operations diluted	$ (0.13)	$ (1.08)
Minimum subordinate voting share conversion of the TEUs (in shares)	0	25,665,433

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The profit (loss) from discontinued operations excluded from (loss) earnings per share calculation. [Refer: Discontinued operations [member]; Profit (loss)]

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Weighted Average Number Of Ordinary Shares Outstanding, Minimum Share Conversion Of Convertible Instruments

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Adjustment to profit (loss) for non-participating preference share dividends to calculate profit (loss) attributable to ordinary equity holders of the parent entity. [Refer: Preference shares [member]; Profit (loss)]

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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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Basic earnings (loss) per share from continuing operations. [Refer: Basic earnings (loss) per share; Continuing operations [member]]

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Basic earnings (loss) per share from discontinued operations. [Refer: Basic earnings (loss) per share; Discontinued operations [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), both adjusted for the effects of all dilutive potential ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

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Diluted earnings (loss) per share from continuing operations. [Refer: Continuing operations [member]; Diluted earnings (loss) per share]

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Diluted earnings (loss) per share from discontinued operations. [Refer: Diluted earnings (loss) per share; Discontinued operations [member]]

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The profit (loss) from continuing and discontinued operations attributable to owners of the parent. [Refer: Profit (loss)]

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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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