Equity (Tables)

9 Months Ended

Sep. 30, 2024

Equity

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

		Weighted
		Average
		Grant Date
	RSU and PSU	Fair Value
	Aggregate Units	Per Unit
Unvested at January 1, 2024	437,239	$	213.06
Granted(1)	170,611		289.07
Vested	(6,527)		207.83
Cancelled or forfeited	(33,708)		227.78
Unvested at September 30, 2024	567,615	$	235.10
Shares reserved for future grants (all plans)	1,357,738

(1) Comprised of 100,669 RSUs and 69,942 PSUs granted in February 2024. The RSUs cliff vest on December 1, 2026 and the PSUs vest upon the completion of a 3-year performance period ending December 31, 2026.

Schedule of share repurchase activity

	2024					2023
		Average Cost					Average Cost
	Shares	Per Share		Amount		Shares	Per Share		Amount
				(in millions)					(in millions)
First quarter	—	$	—	$	—	160,224	$	242.86	$	38.9
Second quarter	1,804,180		287.81		519.3	308,454		239.55		73.9
Third quarter	1,535,266		281.37		432.0	467,213		270.49		126.4
	3,339,446	$	284.85	$	951.3	935,891	$	255.56	$	239.2

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, 2024	$	(75.7)	$	(1.0)	$	(76.7)
Current-period change		(3.8)		(2.6)		(6.4)
Balance as of September 30, 2024	$	(79.5)	$	(3.6)	$	(83.1)