Common stock and additional paid-in capital - Schedule of Stockholders' Equity (Details)					2 Months Ended	12 Months Ended
		May 12, 2022 USD ($) tranche $ / shares shares	Aug. 10, 2021 USD ($) $ / shares shares	Nov. 13, 2020 USD ($) entity $ / shares shares	Dec. 31, 2022 USD ($) shares	Dec. 31, 2023 USD ($) shares	Oct. 31, 2022 USD ($) shares	Oct. 31, 2021 USD ($) shares	Aug. 09, 2021 shares
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, common shares, outstanding (in shares) | shares					176,000,000	176,100,000	163,300,000
Beginning balance, equity | $					$ 497,800,000	$ 501,600,000	$ 434,000,000.0	$ 1,500,000
Shares issued | $							$ 49,700,000	21,600,000
Issuance of shares through Business Combination (in shares) | shares			65,671,374
Issuance of shares through Business Combination | $								477,000,000.0
Settlement of RSUs | $								$ 800,000
Exercise of stock options (in shares) | shares			28,779		141,919	1,581,424	1,547,113	2,172,820
Exercise of stock options | $								$ 200,000
Stock-based compensation - RSUs | $					$ 1,600,000	$ 9,800,000	$ 11,500,000	700,000
Stock-based compensation - options | $					$ 600,000	3,600,000	$ 6,600,000	$ 2,700,000
Payment to the holders of non-controlling interest in subsidiary | $						$ (600,000)
Ending balance, common shares, outstanding (in shares) | shares					176,100,000	178,200,000	176,000,000	163,300,000
Ending balance, equity | $					$ 501,600,000	$ 376,400,000	$ 497,800,000	$ 434,000,000.0
Business combination exchange ratio			0.0251
Sale of stock, number of shares issued in transaction (in shares) | shares			31,549,000
Sale of stock, price per share (in dollars per share) | $ / shares			$ 10.00
Sale of stock, consideration received on transaction | $			$ 315,500,000
Common and preferred stock, shares outstanding (in shares) | shares									2,407,535
Stock converted, reverse recapitalization (in shares) | shares			96,084,679
Proceeds from issuance of common stock | $		$ 49,700,000	$ 525,329,273
Exercise of stock options (in shares) | shares			28,779		141,919	1,581,424	1,547,113	2,172,820
LGES and LGC
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Sale of stock, number of shares issued in transaction (in shares) | shares		5,300,352
Sale of stock, consideration received on transaction | $		$ 50,000,000
Shares issued, price per share (in dollars per share) | $ / shares		$ 9.43
Sale of stock, number of tranches | tranche		2
LG Energy Solution, Ltd. (LGES)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Sale of stock, number of shares issued in transaction (in shares) | shares		2,650,176
LG Chem, Ltd. (LGC)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Sale of stock, number of shares issued in transaction (in shares) | shares		2,650,176
Restricted share units
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation arrangement by share-based payment award, non-option equity instruments, outstanding, number (in shares) | shares			9,829
Share-based compensation arrangement by share-based payment award, shares issued in period (in shares) | shares			392,276
Stock options
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation arrangement by share-based payment award, shares issued in period (in shares) | shares			1,031,226
Series C Private Placement
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Sale of stock, number of entities in transaction | entity				2
Sale of stock, number of shares issued in transaction (in shares) | shares				281,138
Sale of stock, price per share (in dollars per share) | $ / shares				$ 81.81
Sale of stock, consideration received on transaction | $				$ 23,000,000
Sale of stock, stock issuance costs | $				$ 1,400,000
Tranche One | LGES and LGC
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Sale of stock, number of shares issued in transaction (in shares) | shares		4,416,960
Sale of stock, consideration received on transaction | $		$ 44,200,000
Shares issued, price per share (in dollars per share) | $ / shares		$ 10.00
Tranche Two | LGES and LGC
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Sale of stock, number of shares issued in transaction (in shares) | shares		883,392
Sale of stock, consideration received on transaction | $		$ 5,800,000
Shares issued, price per share (in dollars per share) | $ / shares		$ 6.60
Number of common shares
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, common shares, outstanding (in shares) | shares	[1]				176,000,000.0	176,100,000	163,300,000	83,400,000
Shares issued (in shares) | shares	[1]						5,300,000	11,200,000
Shares issued for non-cash costs (in shares) | shares	[1]							500,000
Issuance of shares through Business Combination (in shares) | shares	[1]							65,700,000
Settlement of RSUs (in shares) | shares	[1]					800,000	300,000	400,000
Exercise of stock options (in shares) | shares	[1]				100,000	1,300,000	1,400,000	2,100,000
Exercise of warrants (in shares) | shares							5,700,000
Ending balance, common shares, outstanding (in shares) | shares	[1]				176,100,000	178,200,000	176,000,000.0	163,300,000
Exercise of stock options (in shares) | shares	[1]				100,000	1,300,000	1,400,000	2,100,000
Common stock and additional paid-in capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, equity | $					$ 633,100,000	$ 635,300,000	$ 519,300,000	$ 16,300,000
Shares issued | $							49,700,000	21,600,000
Issuance of shares through Business Combination | $								477,000,000.0
Settlement of RSUs | $								800,000
Exercise of stock options | $								200,000
Exercise of warrants | $							46,000,000.0
Stock-based compensation - RSUs | $					1,600,000	9,800,000	11,500,000	700,000
Stock-based compensation - options | $					600,000	3,600,000	6,600,000	2,700,000
Payment to the holders of non-controlling interest in subsidiary | $						(400,000)
Ending balance, equity | $					$ 635,300,000	$ 648,300,000	$ 633,100,000	$ 519,300,000

[1] The number of common shares has been retrospectively adjusted to reflect the reverse capitalization. See Note 1ii.