Revenue (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jul. 03, 2020	Jul. 03, 2020	Jun. 28, 2019	Dec. 31, 2019
Concentration Risk [Line Items]
Contract liability	$ 47	$ 47		$ 57
Revenue recognized		$ 32	$ 39
Customer Concentration Risk \| Revenue Benchmark
Concentration Risk [Line Items]
Concentration risk percentage	13.00%	12.00%

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No definition available.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

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