Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 30, 2017	Dec. 31, 2016	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Federal Statutory Income Tax Rates [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	35.00%
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability		$ 994
Effective Income Tax Rate Reconciliation, Tax Contingency, Domestic, Percent		(118.10%)
Effective tax rate for continuing operations		(93.80%)	34.90%
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent		2.30%
Unrecognized tax benefits		$ 305					$ 316
Decrease in Unrecognized Tax Benefits is Reasonably Possible		12
Undistributed Earnings of Foreign Subsidiaries		$ 182
Scenario, Forecast [Member]
Federal Statutory Income Tax Rates [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent				21.00%	21.00%	24.50%