Weighted average assumed annual rate of increase in the cost of medical benefits.

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Weighted average assumed annual rate of increase in trending linearly cost.

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- Definition

Amount, after tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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

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Amount, after tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit.

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Amount, before tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit.

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Amount, before tax, of accumulated other comprehensive (income) loss for cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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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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Amount included in accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan expected to be recognized in net periodic benefit (cost) credit for fiscal year following most recent annual statement of financial position.

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Amount included in accumulated other comprehensive (income) loss for prior service cost (credit) expected to be recognized in net periodic benefit cost (credit) for fiscal year following most recent annual statement of financial position.

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Amount of contribution expected to be received by defined benefit plan from employer in next fiscal year following current fiscal year.

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Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

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Amount of increase (decrease) in benefit obligation of defined benefit plan from change in terms of existing plan or initiation of new plan.

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Amount of payment to participant under defined benefit plan which decreases plan assets. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services.

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Amount of (increase) decrease to benefit obligation of defined benefit plan from irrevocable action relieving primary responsibility for benefit obligation and eliminating risk for obligation and assets used to effect settlement. Includes, but is not limited to, lump-sum cash payment to participant in exchange for right to receive specified benefits, purchase of nonparticipating annuity contract and change from remeasurement.

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Amount of cost for defined contribution plan.

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Amount of cash outflow for pension benefit. Includes, but is not limited to, employer contribution to fund plan asset and payment to retiree. Excludes other postretirement benefit.

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Pensions and Postretirement Benefits Other than Pensions - Additional Information (Detail) - USD ($) $ in Thousands		12 Months Ended
	Oct. 26, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Expense for defined contribution plans		$ 9,533	$ 13,370	$ 12,424
Unrecognized prior service credit included in cumulative other comprehensive loss		7,266	5,780
Unrecognized prior service credit, included in cumulative other comprehensive loss, net of tax		5,454	4,338
Unrecognized actuarial losses included in cumulative other comprehensive loss		(417,906)	(413,676)
Unrecognized actual losses included in other comprehensive loss net of tax		(391,362)	(384,507)
Prior service credit expected to be recognized in next fiscal year		1,714
Actuarial loss expected to be recognized in next fiscal year		(33,550)
Accumulated benefit obligation		$ 1,675,825	1,552,037
Weighted average assumed annual rate of increase in the cost of medical benefits		7.00%
Weighted average assumed annual rate of increase in trending linearly cost		4.50%
Contributed to domestic and foreign pension plans		$ 15,552
Minimum
Defined Benefit Plan Disclosure [Line Items]
Expected contributions to domestic and foreign pension plans		45,000
Maximum
Defined Benefit Plan Disclosure [Line Items]
Expected contributions to domestic and foreign pension plans		55,000
United Kingdom plan
Defined Benefit Plan Disclosure [Line Items]
Fair market value of plan assets		407,336	377,536
United States
Defined Benefit Plan Disclosure [Line Items]
Fair market value of plan assets		1,117,650	1,047,214
GERMANY
Defined Benefit Plan Disclosure [Line Items]
Fair market value of plan assets		1,924	1,806
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Benefits paid		81,083	77,718
Plan amendment		2,800	3,069
Fair market value of plan assets		1,526,910	1,426,556	1,261,130
Pension Plan \| United Kingdom plan
Defined Benefit Plan Disclosure [Line Items]
Benefits paid		16,653	18,196
Defined benefit plan, settlements charge		4,155	4,262
Plan amendment	$ 3,704
Pension Plan \| United States
Defined Benefit Plan Disclosure [Line Items]
Benefits paid		66,339	63,176
Plan amendment		2,581	3,069
Fair market value of plan assets		1,117,650	1,047,214	912,129
Pension Plan \| Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Benefits paid		14,744	14,542
Plan amendment		219	0
Fair market value of plan assets		$ 409,260	$ 379,342	$ 349,001