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Stock-Based Compensation Introduction Narrative (Details) shares in Millions | 12 Months Ended
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Dec. 31, 2020 shares
Shares available for future grant under the plan (in shares) | 2.0
Retirement Eligibility Age | 65 years
Retirement Eligibility Age with Ten Years of Service | 55 years
Retirement Eligibility Years Tenure | 10 years
Retirement Eligibility Service Requirement | 1 year
Maximum |
Shares authorized for issuance under the plan (in shares) | 6.0
Restricted Stock Units |
Award Vesting Period | 3 years
Annual Vesting Percentage | 33.33%
Performance Share Units |
Award Vesting Period | 3 years
Annual Vesting Percentage | 33.33%
Number of performance metrics | 2
Performance Share Units | RTSR | Minimum |
Award Vesting Rights, Percentage | 0.00%
Performance Share Units | RTSR | Maximum |
Award Vesting Rights, Percentage | 175.00%
Performance Share Units | Cumulative Free Cash Flow | Minimum |
Award Vesting Rights, Percentage | 0.00%
Performance Share Units | Cumulative Free Cash Flow | Maximum |
Award Vesting Rights, Percentage | 200.00%
Options |
Award Vesting Period | 4 years
Annual Vesting Percentage | 25.00%
Award Expiration Period | 10 years

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- Definition Age attained for which the retirement provision for equity grants provides for continued vesting of awards provided they have been employed or provided services to the Company for one year following the date of grant. + References No definition available. + Details
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- Definition Age attained for which the retirement provision for equity grants provides for continued vesting of awards if the employee has at least ten years of tenure with the Company and provided they have been employed or provided services to the Company for one year following the date of grant. + References No definition available. + Details
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- Definition Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition. + 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)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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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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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + 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 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the 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 (a)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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