Earnings (loss) per share -Schedule of EPS (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	2 Months Ended	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2023	Oct. 31, 2022	Oct. 31, 2021
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Total net income (loss)	$ 1.6	$ (138.0)	$ (50.3)	$ (70.5)
Weighted average number of common shares (in shares)	176.0	177.5	170.7	110.1
Effect of dilutive securities:
Dilutive number of shares (in shares)	180.1	177.5	170.7	110.1
Diluted earnings (loss) per share (in dollars per share)	$ 0.01	$ (0.78)	$ (0.29)	$ (0.64)
Basic earnings (loss) per share (in dollars per share)	$ 0.01	$ (0.78)	$ (0.29)	$ (0.64)
Stock options
Effect of dilutive securities:
Effect of dilutive securities, Stock options and Restricted share units (in shares)	2.1	0.0	0.0	0.0
Restricted share units
Effect of dilutive securities:
Effect of dilutive securities, Stock options and Restricted share units (in shares)	2.0	0.0	0.0	0.0