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Plan Information (Details) - USD ($) shares in Millions, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019
Deferred Compensation Liability, Current and Noncurrent | $ 188.5 | $ 197.5
Incentive compensation plan initiation year | 2019 |
2019 PIP target performance cash award percentage range | range from 0% to 300% of the target amount |
2019 PIP target award percentage range - Executives | 0% to 200% |
Number of shares initially available for grant | 27.0 |
Maximum shares participants are eligible to receive | 2.0 |
Maximum cash award per employee | $ 10.0 |
Vesting period in which the fair value of shares on grant date is amortized over, years | two years |

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- Definition Number of shares authorized for issuance under share-based payment arrangement. + 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 (a)(3) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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