Defined Benefit Plan, Change In Discount Rate on Accumulated Postretirement Benefit Obligation, Percentage

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- Definition

Defined Benefit Plan, Effect Of 0.25 Percentage Point Change In Discount Rate on Accumulated Postretirement Benefit Obligation

+ References

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- Definition

Defined Benefit Plan, Weighted Average Term of Benefit Obligation

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- Definition

Defined Contribution Plan, Number Of Plans

+ References

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- Definition

Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

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- Definition

Amount of contribution expected to be received by defined benefit plan from employer in remainder of current fiscal year. Excludes contribution previously paid by employer in current fiscal year.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 6
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 55
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4587-114921

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- Definition

Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
-Section 55
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921

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-Section 50
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-URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

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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.

+ References

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- Definition

Amount of cost for defined contribution plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942

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- Definition

Amount of cost (reversal of cost) for pension and other postretirement benefits.

+ References

No definition available.

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PENSION AND OTHER POSTRETIREMENT BENEFITS (Narrative) (Details)	3 Months Ended		9 Months Ended
	Sep. 26, 2021 USD ($)	Sep. 27, 2020 USD ($)	Sep. 26, 2021 USD ($) plan	Sep. 27, 2020 USD ($)	Dec. 27, 2020 USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Retirement plan expenses	$ 13,600,000	$ 4,300,000	$ 13,300,000	$ 6,200,000
Accumulated benefit obligation, defined benefit pension plans	386,400,000		$ 386,400,000		$ 404,200,000
Weighted average duration of defined benefit obligation			18 years 2 months 19 days
Expenses related to defined contribution plans	$ 3,600,000		$ 11,700,000
U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Number of defined contribution plans \| plan			2
Mexico
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Number of defined contribution plans \| plan			3
U.K. and Europe
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Number of defined contribution plans \| plan			2
Fixed income securities \| Union Plan
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Target plan asset allocations	50.00%		50.00%
Fixed income securities \| GK Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Target plan asset allocations	35.00%		35.00%
Fixed income securities \| U.K. Plans
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Target plan asset allocations	28.00%		28.00%
Equity securities \| Union Plan
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Target plan asset allocations	50.00%		50.00%
Equity securities \| GK Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Target plan asset allocations	60.00%		60.00%
Equity securities \| U.K. Plans
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Target plan asset allocations	62.00%		62.00%
Real estate \| GK Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Target plan asset allocations	5.00%		5.00%
Real estate \| U.K. Plans
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Target plan asset allocations	10.00%		10.00%
Pension Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Expected contributions, remainder of 2021	$ 1,800,000		$ 1,800,000
Other Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Change in discount rate on projected benefit obligation, percentage			0.25%
Impact of 0.25% change in discount rate on projected benefit obligation			$ 1,000
Expected contributions, remainder of 2021	$ 100,000		$ 100,000