Business Divestitures and Asset Sales - Assets and Liabilities Classified as Held For Sale (Details) - Discontinued Operations, Held-for-sale $ in Millions	Apr. 03, 2020 USD ($)
Airport Security and Automation Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Receivables	$ 75
Contract assets	75
Inventories	136
Other current assets	11
Property, plant and equipment	39
Goodwill	588
Other intangible assets	203
Other assets	19
Assets of disposal group held for sale	1,146
Accounts payable	82
Contract liabilities	34
Other accrued items	24
Other non-current liabilities	33
Deferred taxes	22
Liabilities of disposal group held for sale	195
EOTech Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Receivables	10
Inventories	12
Property, plant and equipment	3
Goodwill	9
Other intangible assets	12
Other assets	2
Assets of disposal group held for sale	48
Accounts payable	4
Contract liabilities	1
Other accrued items	3
Liabilities of disposal group held for sale	$ 8