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TREASURY STOCK PURCHASE (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2018	Feb. 28, 2019	Feb. 26, 2019	Aug. 07, 2018	May 29, 2018	Feb. 27, 2018	Feb. 28, 2017
Treasury Stock Purchase
Number of shares repurchased of common stock from employees in lieu of cash or withholding taxes due	34,976
Cash payment for repurchase of common stock from employees in lieu of cash or withholding taxes due	$ 2.1
Subsequent event
Treasury Stock Purchase
Share repurchase program, authorized amount		$ 520.6	$ 500.0
February 2017 Repurchase Plan
Treasury Stock Purchase
Share repurchase program, authorized amount							$ 500.0
Common stock repurchased (in shares)	4,300,000
Average purchase price (in dollars per share)	$ 57.74
Repurchase price of stock	$ 249.9
February 2018 Repurchase Program
Treasury Stock Purchase
Share repurchase program, authorized amount						$ 250.0
Common stock repurchased (in shares)	5,000,000
Average purchase price (in dollars per share)	$ 49.81
Repurchase price of stock	$ 249.9
May 2018 Repurchase Plan
Treasury Stock Purchase
Share repurchase program, authorized amount					$ 500.0
Common stock repurchased (in shares)	9,000,000
Average purchase price (in dollars per share)	$ 55.55
Repurchase price of stock	$ 499.9
August 2018 Repurchase Plan
Treasury Stock Purchase
Share repurchase program, authorized amount				$ 500.0
Common stock repurchased (in shares)	6,000,000
Average purchase price (in dollars per share)	$ 57.11
Repurchase price of stock	$ 340.3
August 2018 Repurchase Plan | Subsequent event
Treasury Stock Purchase
Share repurchase program, authorized remaining amount			$ 20.6

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Amount of cash outflow to satisfy an employee's income tax withholding obligation as part of a net-share settlement of a share-based award.

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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Total cost of shares repurchased divided by the total number of shares repurchased.

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