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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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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 25 -Paragraph 19A -URI http://asc.fasb.org/extlink&oid=96949009&loc=SL79513924-113897 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21463-112644 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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