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TREASURY STOCK PURCHASE (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2019	Feb. 28, 2020	Nov. 06, 2019	Feb. 26, 2019	Aug. 07, 2018
Treasury Stock Purchase
Number of shares repurchased of common stock from employees in lieu of cash or withholding taxes due	1,400,000
Cash payment for repurchase of common stock from employees in lieu of cash or withholding taxes due	$ 84.5
August 2018 Repurchase Plan
Treasury Stock Purchase
Share repurchase program, authorized amount					$ 500.0
Common stock repurchased (in shares)	2,900,000
Average purchase price (in dollars per share)	$ 54.68
Repurchase price of stock	$ 159.6
February 2019 Repurchase Plan
Treasury Stock Purchase
Share repurchase program, authorized amount				$ 500.0
Common stock repurchased (in shares)	8,100,000
Average purchase price (in dollars per share)	$ 57.16
Share repurchase program, authorized remaining amount		$ 36.6
Repurchase price of stock	$ 463.3
November 2019 Repurchase Plan
Treasury Stock Purchase
Share repurchase program, authorized amount			$ 500.0
Common stock repurchased (in shares)	0
Share repurchase program, authorized remaining amount		$ 500.0

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- Definition

Represents the number of shares repurchased of common stock to satisfy employee tax withholding obligations for stock issued as part of an employee benefit plan.

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Amount of cash outflow to satisfy grantee's tax withholding obligation for award under share-based payment arrangement.

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Amount of stock repurchase plan authorized.

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Amount remaining of a stock repurchase plan authorized.

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Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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Total cost of shares repurchased divided by the total number of shares repurchased.

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Number of shares that have been repurchased during the period and are being held in treasury.

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