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STOCK-BASED COMPENSATION - Exercise Prices (Details) shares in Thousands | 12 Months Ended
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Dec. 31, 2018 $ / shares shares
Stock options outstanding and stock options exercisable |
Number Outstanding (in shares) | shares | 18,890
Options Outstanding, Weighted Average Remaining Contractual Term (Years) | 5 years 9 months 18 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 34.61
Options Exercisable (in shares) | shares | 10,432
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 23.10
Range of Exercise Prices $5.94 - $5.94 |
Stock options outstanding and stock options exercisable |
Stock options, range of exercise prices, low end of range (in dollars per share) | 5.94
Stock options, range of exercise prices, high end of range (in dollars per share) | $ 5.94
Number Outstanding (in shares) | shares | 3,086
Options Outstanding, Weighted Average Remaining Contractual Term (Years) | 10 months 24 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 5.94
Options Exercisable (in shares) | shares | 3,086
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 5.94
Range of Exercise Prices $6.02 - $17.99 |
Stock options outstanding and stock options exercisable |
Stock options, range of exercise prices, low end of range (in dollars per share) | 6.02
Stock options, range of exercise prices, high end of range (in dollars per share) | $ 17.99
Number Outstanding (in shares) | shares | 2,109
Options Outstanding, Weighted Average Remaining Contractual Term (Years) | 4 years
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 16.13
Options Exercisable (in shares) | shares | 2,109
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 16.13
Range of Exercise Prices $18.64 - $23.68 |
Stock options outstanding and stock options exercisable |
Stock options, range of exercise prices, low end of range (in dollars per share) | 18.64
Stock options, range of exercise prices, high end of range (in dollars per share) | $ 23.68
Number Outstanding (in shares) | shares | 2,227
Options Outstanding, Weighted Average Remaining Contractual Term (Years) | 5 years
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 22.77
Options Exercisable (in shares) | shares | 1,970
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 22.71
Range of Exercise Prices $36.05 - $43.64 |
Stock options outstanding and stock options exercisable |
Stock options, range of exercise prices, low end of range (in dollars per share) | 36.05
Stock options, range of exercise prices, high end of range (in dollars per share) | $ 43.64
Number Outstanding (in shares) | shares | 1,932
Options Outstanding, Weighted Average Remaining Contractual Term (Years) | 7 years 2 months 12 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 41.59
Options Exercisable (in shares) | shares | 683
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 40.41
Range of Exercise Prices $43.99 - $43.99 |
Stock options outstanding and stock options exercisable |
Stock options, range of exercise prices, low end of range (in dollars per share) | 43.99
Stock options, range of exercise prices, high end of range (in dollars per share) | $ 43.99
Number Outstanding (in shares) | shares | 2,325
Options Outstanding, Weighted Average Remaining Contractual Term (Years) | 7 years 2 months 12 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 43.99
Options Exercisable (in shares) | shares | 856
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 43.99
Range of Exercise Prices $44.73 - $45.01 |
Stock options outstanding and stock options exercisable |
Stock options, range of exercise prices, low end of range (in dollars per share) | 44.73
Stock options, range of exercise prices, high end of range (in dollars per share) | $ 45.01
Number Outstanding (in shares) | shares | 623
Options Outstanding, Weighted Average Remaining Contractual Term (Years) | 7 years 1 month 6 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 44.94
Options Exercisable (in shares) | shares | 225
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 44.94
Range of Exercise Prices $45.16 - $45.16 |
Stock options outstanding and stock options exercisable |
Stock options, range of exercise prices, low end of range (in dollars per share) | 45.16
Stock options, range of exercise prices, high end of range (in dollars per share) | $ 45.16
Number Outstanding (in shares) | shares | 1,998
Options Outstanding, Weighted Average Remaining Contractual Term (Years) | 6 years 1 month 6 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 45.16
Options Exercisable (in shares) | shares | 1,183
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 45.16
Range of Exercise Prices $45.55- $55.20 |
Stock options outstanding and stock options exercisable |
Stock options, range of exercise prices, low end of range (in dollars per share) | 45.55
Stock options, range of exercise prices, high end of range (in dollars per share) | $ 55.20
Number Outstanding (in shares) | shares | 1,899
Options Outstanding, Weighted Average Remaining Contractual Term (Years) | 8 years 4 months 24 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 48.24
Options Exercisable (in shares) | shares | 313
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 46.81
Range of Exercise Prices $56.08- $57.36 |
Stock options outstanding and stock options exercisable |
Stock options, range of exercise prices, low end of range (in dollars per share) | 56.08
Stock options, range of exercise prices, high end of range (in dollars per share) | $ 57.36
Number Outstanding (in shares) | shares | 81
Options Outstanding, Weighted Average Remaining Contractual Term (Years) | 9 years 7 months 6 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 57.16
Options Exercisable (in shares) | shares | 1
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 56.08
Range of Exercise Prices $58.73- $67.93 |
Stock options outstanding and stock options exercisable |
Stock options, range of exercise prices, low end of range (in dollars per share) | 58.73
Stock options, range of exercise prices, high end of range (in dollars per share) | $ 67.93
Number Outstanding (in shares) | shares | 2,610
Options Outstanding, Weighted Average Remaining Contractual Term (Years) | 9 years 1 month 6 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 58.89
Options Exercisable (in shares) | shares | 6
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 62.92

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- Definition The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(iii) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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