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STOCK-BASED COMPENSATION.

9 Months Ended

Sep. 30, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

STOCK-BASED COMPENSATION

STOCK-BASED COMPENSATION.

STOCK OPTIONS.

The following table summarizes the status of, and changes in, our stock options during the nine months ended September 30, 2018.

	Options			Weighted- average exercise price
Outstanding at December 31, 2017	15,221,123			$	66.98
Exercised	(3,678,053	)		$	60.64
Forfeited	(46,490	)		$	75.96
Expired	(14,364	)		$	71.15
Outstanding at September 30, 2018	11,482,216			$	68.97
Exercisable at September 30, 2018	7,460,677			$	65.35

RESTRICTED SHARES AND STOCK UNITS.

The following table summarizes the status of, and changes in, our nonvested restricted shares and restricted stock units during the nine months ended September 30, 2018.

	Restricted shares			Restricted stock units			Weighted-average fair value
Nonvested at December 31, 2017	473,115			5,556,911			$	82.37
Time-based grants	8,775			29,587			$	112.46
Vested	(20,580	)		(55,148	)		$	71.62
Forfeited	(8,092	)		(99,186	)		$	78.16
Nonvested at September 30, 2018	453,218			5,432,164			$	82.78

Nonvested at September 30, 2018, includes 7,200 performance-based restricted shares and 406,412 performance-based restricted stock units. These performance-based restricted shares and units include 7,200 restricted shares and 291,958 restricted stock units for which the performance period has lapsed, and the performance threshold has been met.

FUTURE STOCK-BASED COMPENSATION EXPENSE.

The following table presents the compensation expense (in millions) to be recognized over the remaining vesting periods of the stock-based awards outstanding at September 30, 2018. Estimated future compensation expense will change to reflect future grants of restricted stock awards and units, future option grants, changes in the probability of performance thresholds being met, and adjustments for actual forfeitures.

Fourth quarter 2018	$	40.4
2019	96.2
2020 through 2023	79.5
Total	$	216.1

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- Definition

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-URI http://asc.fasb.org/topic&trid=2228938

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 50
-URI http://asc.fasb.org/subtopic&trid=2208855

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- References

No definition available.

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