Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Name:	us-gaap_GoodwillImpairmentLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Goodwill and Other Intangible Assets - Additional Information (Details) - USD ($)	3 Months Ended
	Apr. 03, 2020	Sep. 27, 2019	Mar. 29, 2019
Finite-Lived Intangible Assets [Line Items]
Impairment of goodwill	$ 301,000,000	$ 0
L3Harris
Finite-Lived Intangible Assets [Line Items]
Amortization expense for intangible assets	158,000,000
Exelis
Finite-Lived Intangible Assets [Line Items]
Amortization expense for intangible assets			$ 29,000,000
Commercial Aviation Solutions
Finite-Lived Intangible Assets [Line Items]
Impairment of goodwill	296,000,000
Goodwill impairment loss attributable to noncontrolling interests	$ 28,000,000