Unaudited condensed consolidated interim statements of operations and comprehensive loss - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenue
Revenues	$ 8.4	$ 3.6	$ 12.6	$ 7.2
Cost of sales
Cost of sales	(19.4)	(20.2)	(37.3)	(39.3)
Selling, general and administrative expense	(15.3)	(24.9)	(45.9)	(47.6)
Research and development	(0.6)	(1.3)	(0.5)	(2.2)
Loss from operations	(26.9)	(42.8)	(71.1)	(81.9)
Other income (expense)
Interest income	0.9	4.2	1.5	9.2
Interest expense	(15.6)	(0.1)	(27.1)	(1.2)
Foreign exchange gain (loss)	(1.3)	(0.5)	(0.2)	(1.0)
Fair value gain on financial instruments	34.7	7.3	10.9	6.6
Debt extinguishment loss (Note 11)	0.0	0.0	(58.9)	0.0
Interest expense and other costs	18.7	10.9	(73.8)	13.6
Net loss before taxes	(8.2)	(31.9)	(144.9)	(68.3)
Income tax	0.0	0.0	0.0	(0.1)
Comprehensive loss	(8.2)	(31.9)	(144.9)	(68.4)
Net (loss) income	(8.2)	(31.9)	(144.9)	(68.4)
Net loss and comprehensive loss attributable to
Shareholders of Li-Cycle Holdings Corp., net loss	(8.2)	(32.0)	(144.9)	(68.3)
Shareholders of Li-Cycle Holdings Corp., net loss, comprehensive loss	(8.2)	(32.0)	(144.9)	(68.3)
Non-controlling interest, net loss	0.0	(0.1)	0.0	(0.1)
Non-controlling interest, comprehensive loss	$ 0.0	$ (0.1)	$ 0.0	$ (0.1)
Loss per common share - basic (in dollars per share)	$ (0.36)	$ (1.45)	$ (6.44)	$ (3.08)
Loss per common share - diluted (in dollars per share)	$ (0.36)	$ (1.45)	$ (6.44)	$ (3.08)
Product revenue
Revenue
Revenues	$ 5.2	$ 3.1	$ 7.1	$ 6.2
Cost of sales
Cost of sales	(17.9)	(20.2)	(34.9)	(39.3)
Recycling service revenue
Revenue
Revenues	3.2	0.5	5.5	1.0
Cost of sales
Cost of sales	$ (1.5)	$ 0.0	$ (2.4)	$ 0.0