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Supplemental Financial Information - Cash and cash equivalents (Details) - USD ($)	3 Months Ended						9 Months Ended
	Sep. 27, 2020	Jun. 28, 2020	Mar. 29, 2020	Sep. 29, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 27, 2020	Sep. 29, 2019	Dec. 31, 2019
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 3,566,000,000						$ 3,566,000,000		$ 1,045,000,000
Dividends	105,000,000	$ 105,000,000	$ 105,000,000	$ 105,000,000	$ 70,000,000	$ 71,000,000	315,000,000	$ 246,000,000
SSMC
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 177,000,000						177,000,000		$ 188,000,000
Dividends							$ 90,000,000	$ 0
TSMC
Cash and Cash Equivalents [Line Items]
Ownership percentage by noncontrolling owners	38.80%						38.80%