Equity (Tables)

12 Months Ended

Dec. 31, 2022

Equity

Schedule of issued and outstanding common shares activity

	Year Ended December 31,
	2022		2021		2020
	(in thousands)
Issued and outstanding common shares, beginning balances		61,806		63,600		66,854
Issued to settle RSUs and PSUs, net of withheld shares		506		313		414
Issued for stock option exercises		—		—		6
Repurchased		(3,525)		(2,107)		(3,674)
Issued and outstanding common shares, ending balances		58,787		61,806		63,600

Schedule of share repurchase activity

		Average Cost
	Shares	Per Share		Amount
	(in thousands)			(in millions)
2022	3,525	$	178.81	$	630.3
2021	2,107	$	153.55	$	323.5
2020	3,674	$	91.80	$	337.3

Schedule of accumulated other comprehensive loss

			Pension and
	Foreign Currency		Postretirement Benefit		Accumulated Other
	Translation		Plan Adjustments,		Comprehensive
	Loss		Net of Tax		Loss
			(in millions)
Balance as of January 1, 2022	$	(55.2)	$	(13.7)	$	(68.9)
Current-year change		(28.8)		11.4		(17.4)
Balance as of December 31, 2022	$	(84.0)	$	(2.3)	$	(86.3)