Leases (Schedule of components of lease income) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Oct. 02, 2020	Sep. 27, 2019	Oct. 02, 2020	Sep. 27, 2019
Sales-type leases:
Selling price at lease commencement	$ 16	$ 53	$ 44	$ 68
Cost of underlying asset	(12)	(56)	(35)	(70)
Operating income (loss)	4	(3)	9	(2)
Interest income on lease receivables	2	1	6	1
Sales-type lease, lease income	6	(2)	15	(1)
Operating leases
Operating lease income	6	4	21	19
Total lease income	$ 12	$ 2	$ 36	$ 18

Cost of goods sold for sales-type financing lease.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 30
-Section 50
-Paragraph 5
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=121576215&loc=SL77919372-209981

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 270
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=121640914&loc=SL77927221-108306

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Amount of lease income from operating, direct financing, and sales-type leases. Includes, but is not limited to, variable lease payments, interest income, profit (loss) recognized at commencement, and lease payments paid and payable to lessor.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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Amount of interest income from lease receivable of sales-type lease.

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-URI http://asc.fasb.org/extlink&oid=121576215&loc=SL77919372-209981

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Amount of lease income from variable lease payments, interest income from net investment on sales-type lease, and profit (loss) recognized at commencement.

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-Publisher FASB
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Amount of sales-type lease revenue.

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Amount of profit (loss) recognized at commencement from sales-type lease.

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