No definition available.

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

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- Definition

Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(i)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.D.2)
-URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809

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- Definition

Represents the weighted average price at which grantees can acquire the shares reserved for issuance on awards.

+ References

No definition available.

+ Details

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SHARE-BASED COMPENSATION - Share Options And SARs Fair Value Assumptions (Details) - $ / shares	12 Months Ended		24 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019
Weighted average assumptions used in the BSM pricing model for grants made
Weighted-average grant date fair value of awards (in dollars per share)	$ 15.97	$ 14.62
2018 plan
Weighted average assumptions used in the BSM pricing model for grants made
Dividend yield (as a percent)	0.00%
Expected annual volatility (as a percent)	50.00%
Weighted-average grant date fair value of awards (in dollars per share)	$ 131.25
2018 plan \| Minimum
Weighted average assumptions used in the BSM pricing model for grants made
Risk-free interest rate (as a percent)	7.76%
Expected life of the awards (years)	6 years 21 days
2018 plan \| Maximum
Weighted average assumptions used in the BSM pricing model for grants made
Risk-free interest rate (as a percent)	8.88%
Expected life of the awards (years)	6 years 1 month 6 days
Options and SARs
Weighted average assumptions used in the BSM pricing model for grants made
Dividend yield (as a percent)			0.00%
Expected annual volatility (as a percent)		39.00%
Options and SARs \| Minimum
Weighted average assumptions used in the BSM pricing model for grants made
Expected annual volatility (as a percent)	39.40%
Risk-free interest rate (as a percent)	1.64%	2.72%
Expected life of the awards (years)	5 years 10 months 28 days	7 years 25 days
Options and SARs \| Maximum
Weighted average assumptions used in the BSM pricing model for grants made
Expected annual volatility (as a percent)	41.10%
Risk-free interest rate (as a percent)	1.88%	2.90%
Expected life of the awards (years)	6 years 18 days	7 years 1 month 9 days