Fair Value Of Shares Granted

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- Definition

Value of shares vested as of grant date

+ References

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Number off shares of stock vested in the period

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- Definition

Amount of noncash expense for share-based payment arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Net number of share options (or share units) granted during the period.

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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 (c)(1)(iv)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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Stock Compensation (Details) - USD ($)	3 Months Ended		9 Months Ended
Stock Compensation (Details) - USD ($)	Sep. 30, 2021	Oct. 01, 2020	Sep. 30, 2021	Oct. 01, 2020
LTIA AND Prior Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Company recognized total stock compensation expense, net of forfeitures	$ 6,200,000	$ 6,200,000	$ 19,600,000	$ 17,100,000
Class A [Member] \| Long Term Incentive Plan RSU [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted			557,851
Class A [Member] \| Board of Directors Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair Value Of Shares Granted			$ 1,600,000
Class A [Member] \| Board of Directors Plan [Member] \| Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Vested			11,133
Number of shares granted			6,055
Grant date value of shares vested			$ 0.2
Class A [Member] \| Board of Directors Plan [Member] \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Vested			53,617
Number of shares granted			29,514
Grant date value of shares vested			$ 1,000,000.0
Class A [Member] \| Service Based LTIA [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted			30,024
Class A [Member] \| Performance Based LTIP RSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted			161,954
Fair Value Of Shares Granted			$ 9,800,000
Class A [Member] \| Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Vested			270,343
Fair Value Of Shares Granted			$ 26,400,000
Grant date value of shares vested			$ 18,800,000