Equity (Tables)

6 Months Ended

Jun. 30, 2023

Equity

Summary of the status of the Company's restricted stock units and changes during the quarter

		Weighted
		Average
	RSU and PSU	Grant Date
	Aggregate Units	Fair Value
Unvested at January 1, 2023	582,012	$	164.60
Granted(1)	193,812		247.90
Vested	(2,867)		156.80
Cancelled or forfeited	(7,876)		176.98
Unvested at June 30, 2023	765,081	$	185.60
Shares reserved for future grants (all plans)	1,458,557

(1) Comprised of 109,683 RSUs and 84,129 PSUs granted in February 2023. The service-based RSUs cliff vest on December 1, 2025 and the performance-based RSUs are subject to a 3-year performance period ending December 31, 2025.

Schedule of share repurchase activity

	2023					2022
		Average Cost					Average Cost
	Shares	Per Share		Amount		Shares	Per Share		Amount
				(in millions)					(in millions)
First quarter	160,224	$	242.86	$	38.9	113,529	$	150.97	$	17.1
Second quarter	308,454		239.55		73.9	1,085,635		178.61		193.9
	468,678	$	240.68	$	112.8	1,199,164	$	176.00	$	211.0

Schedule of accumulated other comprehensive loss

			Pension and
	Foreign Currency		Postretirement Benefit		Accumulated Other
	Translation		Plan Adjustments,		Comprehensive
	(Loss) Gain		Net of Tax		Loss
			(in millions)
Balance as of January 1, 2023	$	(84.0)	$	(2.3)	$	(86.3)
Current-period change		1.2		(1.5)		(0.3)
Balance as of June 30, 2023	$	(82.8)	$	(3.8)	$	(86.6)