Equity (Tables)

12 Months Ended

Dec. 31, 2023

Equity

Schedule of issued and outstanding common shares activity

	Year Ended December 31,
	2023		2022		2021
	(in thousands)
Issued and outstanding common shares, beginning balances		58,787		61,806		63,600
Issued to settle RSUs and PSUs, net of withheld shares		362		506		313
Repurchased		(1,878)		(3,525)		(2,107)
Issued and outstanding common shares, ending balances		57,271		58,787		61,806

Schedule of share repurchase activity

		Average Cost
	Shares	Per Share		Amount
	(in thousands)			(in millions)
2023	1,878	$	255.30	$	479.5
2022	3,525	$	178.81	$	630.3
2021	2,107	$	153.55	$	323.5

Schedule of accumulated other comprehensive loss

			Pension and
	Foreign Currency		Postretirement Benefit		Accumulated Other
	Translation		Plan Adjustments,		Comprehensive
	(Loss) Gain		Net of Tax		(Loss) Income
			(in millions)
Balance as of January 1, 2023	$	(84.0)	$	(2.3)	$	(86.3)
Current-year change		8.3		1.3		9.6
Balance as of December 31, 2023	$	(75.7)	$	(1.0)	$	(76.7)