Stock-Based Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2020

Stock-Based Compensation Plans [Abstract]

Schedule Of Comparative Date For Performance Stock Units

		2020 Awards			2019 Awards			2018 Awards
TSR Awards
Shares of stock granted - target		5,156			7,029			7,523
Per-share fair value	$	643.44		$	434.51		$	341.20
Volatility		21.4	%		21.4	%		22.9	%
Risk-free interest rate		1.3	%		2.45	%		2.34	%
EPS Awards
Shares of stock granted - target		5,156			7,029			7,523
Per-share fair value	$	487.90		$	322.40		$	256.29
Common Assumptions
Service period (years)		2.9			2.9			2.9
Three-year measurement period ends December 31,		2022			2021			2020

Schedule Of Total Stock Option, Stock Award And PSU Activity

	Stock Options						Stock Awards			Performance Units (PSUs)
									Weighted
			Weighted Average			Aggregate			Average			Weighted
				Remaining		Intrinsic			Grant-Date	Number of		Average
	Number of		Exercise	Contractual		Value	Number of		Per-Share	Target		Grant-Date
	Options		Price	Life (Years)		(thousands)	Awards		Fair Value	Units		Price
Outstanding at January 1, 2020	1,205,948	$	252.77				-	$	-	42,978	$	288.78
Granted	298,670		471.74				2,511		466.43	22,378		365.12
Exercised/Vested	(419,145)		176.73				(2,511)		466.34	(26,454)		197.02
Canceled/ Forfeited	(15,402)		369.84				-		-	(706)		472.68
Outstanding at December 31, 2020	1,070,071	$	341.99	3.5	$	198,910	-	$	-	38,196	$	396.93
Vested and expected to vest
at December 31, 2020	1,070,071	$	341.99	3.5	$	198,910	-	*$	-	69,106	*$	386.33
Exercisable at December 31, 2020	510,938		246.03	2.7		144,003	n.a.		n.a.	n.a.		n.a.
* Amount includes 26,525 share units which vested and were converted to shares of stock and distributed in the first quarter of 2021.

Schedule Of Comparative Data For Stocks Option, Stock Awards And PSUs

		Years Ended December 31,
		2020		2019		2018
Total compensation expense of stock-based compensation
plans charged against income	$	26,802	$	21,338	$	19,229
Total income tax benefit recognized in income for stock
based compensation expense charged against income		6,904		5,373		4,788
Total intrinsic value of stock options exercised		125,448		106,793		102,144
Total intrinsic value of stock awards vested during the period		1,171		767		4,003
Per-share weighted average grant-date fair value of
stock awards granted		466.43		331.69		333.75

Schedule Of Valuation Assumptions

		2020			2019			2018
Stock price on date of issuance	$	471.74		$	413.19		$	306.70
Grant date fair value per share	$	97.56		$	78.06		$	67.16
Number of options granted		298,670			287,010			246,350
Expected term (years)		3.5			4.0			4.0
Risk free rate of return		0.24	%		1.65	%		2.99
Volatility		28.41	%		21.25	%		22.42
Dividend yield		0.3	%		0.3	%		0.4
Forfeiture rate		-			-			-

Schedule Of Other Data For Stock Options, Stock Awards And PSUs

		Stock		Stock
		Options		Awards		PSUs
Total unrecognized compensation at the end of the year	$	44,851	$	-	$	8,223
Weighted average period over which unrecognized compensation to be recognized (years)		2.3		-		1.7
Actual income tax benefit realized	$	29,543	$	276	$	3,123
Aggregate intrinsic value vested and expected to vest	$	198,910	$	-	$	36,479