The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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- Definition

Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Price of a single share of a number of saleable stocks of a company.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Number of options vested.

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SHARE INCENTIVE PLANS (Summary of Share Option Awards Activity Under Equity Incentive Plans) (Details) - Employee Stock Option - USD ($) $ / shares in Units, $ in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 28, 2019	Dec. 31, 2018
Number of Shares
Options outstanding at the beginning of the period (in shares)	494,503
Options exercised (in shares)	(199,425)
Options canceled (in shares)	(1,040)
Options outstanding at the end of the period (in shares)	294,038
Weighted Average Exercise Price
Options outstanding at the beginning of the period (in USD per share)	$ 50.73
Options exercised (in USD per share)	35.43
Options canceled (in USD per share)	91.91
Options outstanding at the end of the period (in USD per share)	$ 60.96
Pretax intrinsic value of options exercised	$ 13.9	$ 19.4
Share price (in USD per share)			$ 110.67
Pretax intrinsic value of options outstanding	$ 14.6			$ 21.8
Options, exercisable, number (in shares)	293,621			493,462
Pretax intrinsic value of exercisable options	$ 14.6			$ 21.7