Divestitures - Narrative (Details) - USD ($) $ in Millions		9 Months Ended	12 Months Ended
	Jan. 01, 2021	Sep. 30, 2021	Dec. 31, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets		$ 84,191	$ 88,229
Liabilities		38,454	38,647
Merger-related and other charges
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain triggered by a joint venture deconsolidation		$ 52
Taiwan Joint Venture
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Carrying value	$ 852
Assets	1,900
Liabilities	1,000
Revenues			$ 600
Taiwan Joint Venture | Merger-related and other charges
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain triggered by a joint venture deconsolidation	$ 52