Stock-Based Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2019

Stock-Based Compensation Plans [Abstract]

Schedule Of Comparative Date For Performance Stock Units

		2019 Awards			2018 Awards			2017 Awards
TSR Awards
Shares of stock granted - target		7,029			7,523			7,304
Per-share fair value	$	434.51		$	341.20		$	226.95
Volatility		21.4	%		22.9	%		21.8	%
Risk-free interest rate		2.45	%		2.34	%		1.44	%
EPS Awards
Shares of stock granted - target		7,029			7,523			7,304
Per-share fair value	$	322.40		$	256.29		$	172.60
Common Assumptions
Service period (years)		2.9			2.9			2.9
Three-year measurement period ends December 31,		2021			2020			2019

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, 2019	1,395,034	$	181.82				-	$	-	48,160	$	207.17
Granted	287,010		413.19				2,313		331.69	27,688		253.44
Exercised/Vested	(464,661)		139.78				(2,313)		331.69	(32,136)		136.48
Canceled/ Forfeited	(11,435)		215.86				-		-	(734)		269.08
Outstanding at December 31, 2019	1,205,948	$	252.77	3.3	$	225,226	-	$	-	42,978	$	288.78
Vested and expected to vest
at December 31, 2019	1,205,948	$	252.77	3.3	$	225,226	-	*$	-	82,603	*$	290.11
Exercisable at December 31, 2019	654,424		172.20	2.6		174,949	n.a.		n.a.	n.a.		n.a.
* Amount includes 27,761 share units which vested and were converted to shares of stock and distributed in the first quarter of 2020.

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

		Years Ended December 31,
		2019		2018		2017
Total compensation expense of stock-based compensation
plans charged against income	$	21,338	$	19,229	$	16,256
Total income tax benefit recognized in income for stock
based compensation expense charged against income		5,373		4,788		5,690
Total intrinsic value of stock options exercised		106,793		102,144		50,192
Total intrinsic value of stock awards vested during the period		767		4,003		6,983
Per-share weighted average grant-date fair value of
stock awards granted		331.69		333.75		203.52

Schedule Of Valuation Assumptions

		2019			2018			2017
Stock price on date of issuance	$	413.19		$	306.70		$	231.91
Grant date fair value per share	$	78.06		$	67.16		$	46.27
Number of options granted		287,010			246,350			330,550
Expected term (years)		4.0			4.0			4.0
Risk free rate of return		1.65	%		2.99	%		1.86
Volatility		21.25	%		22.42	%		22.80
Dividend yield		0.3	%		0.4	%		0.5
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	$	34,640	$	-	$	7,475
Weighted average period over which unrecognized compensation to be recognized (years)		2.3		-		1.7
Actual income tax benefit realized	$	25,193	$	181	$	2,489
Aggregate intrinsic value vested and expected to vest	$	225,226	$	-	$	36,306