Income Taxes Income Tax (Details) - USD ($) $ in Millions			3 Months Ended			9 Months Ended	12 Months Ended
	Mar. 20, 2019	Jan. 01, 2018	Jun. 29, 2019	Dec. 29, 2018	Jun. 30, 2018	Jun. 29, 2019	Sep. 29, 2018
Income Tax [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		35.00%				21.00%	24.50%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount						$ 2,200
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount					$ 400
Unrecognized Tax Benefits, Period Increase (Decrease)						2,100
Unrecognized Tax Benefits			$ 2,700			2,700	$ 600
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit			200			200
Unrecognized Tax Benefits that Would Impact Effective Tax Rate			$ 100			$ 100
21CF
Income Tax [Line Items]
Unrecognized Tax Benefits, Increase Resulting from Acquisition	$ 1,900
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	$ 700
Cash and Cash Equivalents
Income Tax [Line Items]
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Percent						15.50%
Residual Earnings
Income Tax [Line Items]
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Percent						8.00%
Scenario, Plan
Income Tax [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent						24.50%
Minimum | Scenario, Plan
Income Tax [Line Items]
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Percent			13.00%
Maximum | Scenario, Plan
Income Tax [Line Items]
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Percent			16.00%
Accounting Standards Update 2016-16
Income Tax [Line Items]
Adoption of new accounting guidance				$ 100