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Stock Based Compensation (Tables)

12 Months Ended

Dec. 31, 2016

Stock Based Compensation Expense



	Year ended December 31,
	2016			2015			2014
Stock-based compensation expense	$	65,112		$	59,465		$	97,618
Stock-based compensation expense, net of tax		35,974			36,666			60,084
Stock-based compensation expense recognized as capitalized development		946			1,554			1,178



Summary Of Option And SOSAR Activity Under Incentive Plan





	2016					2015					2014
	Shares		Weighted-Average Exercise Price Per Share			Shares		Weighted-Average Exercise Price Per Share			Shares		Weighted-Average Exercise Price Per Share
Outstanding, beginning of year	1,694		$	490.70		2,087		$	395.46		1,690		$	312.44
Granted	460		$	457.77		379		$	659.12		764		$	545.66
Exercised	(124)		$	315.87		(716)		$	297.25		(315)		$	310.32
Forfeited or cancelled	(113)		$	559.25		(56)		$	554.73		(52)		$	419.74
Outstanding, end of year	1,917		$	490.06		1,694		$	490.70		2,087		$	395.46





	Shares		Weighted-Average Exercise Price Per Share			Weighted-Average Remaining Years of Contractual Life		Aggregate Intrinsic Value
Outstanding as of December 31, 2016	1,917		$	490.06		4.4		$	22,040
Vested and expected to vest as of December 31, 2016	1,851		$	489.18		4.3		$	22,040
Exercisable as of December 31, 2016	846		$	422.32		3.3		$	22,040



Summary Of Non-Vested Stock Award Activity Under Incentive Plan



	2016					2015					2014
	Shares		Grant Date Fair Value Per Share			Shares		Grant Date Fair Value Per Share			Shares		Grant Date Fair Value Per Share
Outstanding, beginning of year	116		$	511.88		70		$	525.60		71		$	520.27
Granted	90		$	509.05		47		$	785.32		2		$	495.92
Vested	(7)		$	605.83		(1)		$	413.07		(2)		$	284.11
Forfeited or cancelled	(74)		$	529.54		-		$	534.55		(1)		$	410.55
Outstanding, end of year	125		$	606.24		116		$	511.88		70		$	525.60



Performance Shares [Member]

Schedule Of Assumptions to Value SOSAR or Stock Awards Granted



						2016				2015
Risk-free interest rate							0.9	%			1.0	%
Expected life (years)							3.0				2.9
Expected dividend yield							0.0	%			0.0	%
Volatility							31.4	%			33.7	%



SOSARS [Member]

Schedule Of Assumptions to Value SOSAR or Stock Awards Granted



		2016				2015				2014
Risk-free interest rate			1.0	%			1.1	%			0.8	%
Expected life (years)			3.5				3.4				3.4
Expected dividend yield			0.0	%			0.0	%			0.0	%
Volatility			32.2	%			30.8	%			33.3	%
Weighted-average Black-Scholes fair value per share at date of grant		$	117.48			$	156.32			$	136.18



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- Definition

Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed.

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