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Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2020

Summary Of Stock-Based Compensation Expense

	Year ended December 31,
	2020			2019			2018
Stock-based compensation	$	84,463		$	92,062		$	69,947
Stock-based compensation, net of income taxes	$	69,904		$	73,866		$	51,544
Total capitalized stock-based compensation included in net leasehold improvements, property and equipment on the consolidated balance sheets	$	1,837		$	666		$	783
Excess tax benefit (deficit) on stock-based compensation recognized in provision for income taxes	$	49,690		$	16,203		$	(6,162)

SOSARS [Member]

Summary Of Option And SOSAR Activity Under Incentive Plan

	Shares			Weighted-Average Exercise Price per Share			Weighted-Average Remaining Contractual Life (Years)			Aggregate Intrinsic Value
Outstanding, January 1, 2020		1,132		$	457.14					$	430,595
Granted		116			874.14
Exercised		(470)			433.10
Forfeited or cancelled		(30)			513.19
Outstanding, December 31, 2020		748			533.71			3.9			637,905
Exercisable, December 31, 2020		235			476.68			1.6			213,697
Vested and expected to vest, December 31, 2020		728			528.03			3.9			625,050

Schedule Of Assumptions For SOSAR And PSUs

		2020				2019				2018
Risk-free interest rate			1.3	%			2.4	%			2.4	%
Expected life (years)			3.8				3.9				3.9
Expected dividend yield			0.0	%			0.0	%			0.0	%
Volatility			32.4	%			34.7	%			32.2	%
Weighted-average Black-Scholes fair value per share at date of grant		$	231.52			$	176.79			$	77.61

Restricted Stock Units (RSUs) [Member]

Summary Of Stock Award Activity Under Incentive Plan

							Shares			Weighted-Average Grant Date Fair Value per Share
Outstanding, January 1, 2020								121		$	408.56
Granted								42			905.96
Vested								(60)			381.71
Forfeited or cancelled								(11)			619.11
Outstanding, December 31, 2020								92			631.66
Vested and expected to vest, December 31, 2020								84			618.08

Performance Stock Awards (PSUs) [Member]

Summary Of Stock Award Activity Under Incentive Plan

							Shares			Weighted-Average Grant Date Fair Value per Share
Outstanding, January 1, 2020								103		$	479.83
Granted								27			853.03
Vested								(29)			466.22
Expired								(1)			605.39
Outstanding, December 31, 2020								100			583.46
Vested and expected to vest, December 31, 2020								229			765.23

X

- Definition

Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

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