Shareholders' equity - Narrative (Details) - USD ($)				1 Months Ended			3 Months Ended	12 Months Ended
	Nov. 13, 2023	Nov. 09, 2023	Jun. 02, 2023	Feb. 29, 2024	Dec. 31, 2023	Aug. 31, 2023	Sep. 30, 2023	Dec. 31, 2024	Apr. 30, 2020
Stockholders Equity Note [Line Items]
Common stock, authorized (in shares)					800,000,000			800,000,000
Preferred stock, authorized (in shares)					2,000,000			2,000,000
Common stock, outstanding (in shares)					179,900,000			159,900,000
Treasury stock (in shares)					144,502,338			164,520,591
Preferred stock, issued (in shares)					0			0
Preferred stock, outstanding (in shares)					0			0
Equity method investments					$ 16,195,000			$ 16,280,000
December 2020 Share Repurchase Program
Stockholders Equity Note [Line Items]
Shares repurchased under share repurchase program (in shares)							1,700,000
Share repurchase program expiration date							Dec. 31, 2023
Shares acquired, average cost per share							$ 15.96
Treasury stock, value, acquired, cost method							$ 27,900,000
Accelerated Share Repurchase Program (ASR)
Stockholders Equity Note [Line Items]
Shares approved to be repurchased under share repurchase program, amount (up to)		$ 325,000,000	$ 300,000,000
Shares repurchased under share repurchase program (in shares)	17,300,000	17,300,000	15,200,000	4,000,000		3,100,000
Treasury stock, value, acquired, cost method	$ 260,000,000		$ 240,000,000
Stock repurchase program, percent repurchased	80.00%		80.00%
December 2023 Share Repurchase Program
Stockholders Equity Note [Line Items]
Shares approved to be repurchased under share repurchase program, amount (up to)					$ 650,000,000
Shares repurchased under share repurchase program (in shares)								18,600,000
Share repurchase program expiration date					Dec. 31, 2025
Shares acquired, average cost per share								$ 14.79
Treasury stock, value, acquired, cost method								$ 274,800,000
Stock options
Stockholders Equity Note [Line Items]
Diluted earnings per share amounts exclude the effects of stock awards								270,000
Stock options | Employee
Stockholders Equity Note [Line Items]
Shares reserved for issuance (in shares)									20,000,000
RSU Program | Employee
Stockholders Equity Note [Line Items]
Number of shares of common stock received for each RSU granted								1
Award vesting percentage								25.00%
RSUs
Stockholders Equity Note [Line Items]
Unrecognized compensation cost related to unvested share-based compensation								$ 32,900,000
Unrecognized compensation cost related to unvested share-based compensation for options, recognition period								2 years 6 months
PSAs
Stockholders Equity Note [Line Items]
Award vesting period								2 years
Additional service period								1 year
Incentive period								3 years
Unrecognized compensation cost related to unvested share-based compensation								$ 8,900,000
Unrecognized compensation cost related to unvested share-based compensation for options, recognition period								2 years