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INFORMATION ON BUSINESS SEGMENTS - FAS/CAS Pension Adjustment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 27, 2021	Jun. 28, 2020	Jun. 27, 2021	Jun. 28, 2020
Segment Reporting Information [Line Items]
Non-operating FAS pension income	$ 94	$ 55	$ 187	$ 110
Net FAS/CAS pension adjustment	583	524	1,165	1,048
Unallocated items
Segment Reporting Information [Line Items]
Less: CAS pension cost	516	495	1,032	989
FAS pension service cost	(27)	(26)	(54)	(51)
FAS/CAS operating adjustment	489	469	978	938
Qualified defined benefit pension plans
Segment Reporting Information [Line Items]
FAS pension income	(67)	(29)	(133)	(59)
FAS pension service cost	(27)	(26)	(54)	(51)
Qualified defined benefit pension plans | Qualified Plan
Segment Reporting Information [Line Items]
FAS pension income	$ 67	$ 29	$ 133	$ 59

X

- Definition

The difference between the service cost component of U.S. GAAP FAS pension expense and total pension costs recoverable on U.S. Government contracts as determined in accordance with U.S. Government cost accounting standards

+ References

No definition available.

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- Definition

This item represents the difference between pension expense calculated for financial reporting purposes under GAAP and pension costs calculated and funded in accordance with U.S. Government Cost Accounting Standards (CAS).

+ References

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- Definition

Amount of cost attributable to the non-service component (i.e. interest cost, expected return on plan assets, net actuarial gains or losses and amortization of prior service cost or credits) of financial accounting standards defined benefit plan expense.

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- Definition

Pension expense calculated under U.S. Government Cost Accounting Standards.

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- Definition

Amount of net periodic benefit cost (credit) for defined benefit plan.

+ 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 (a)
-URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920

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- Definition

Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

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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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