Income Taxes Income Tax (Details) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
	Jan. 01, 2018	Dec. 30, 2017	Sep. 30, 2017
Income Tax [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		24.50%	35.00%
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount		$ 300
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount		1,900
Unrecognized Tax Benefits, Period Increase (Decrease)		100
Unrecognized Tax Benefits		900
Unrecognized tax benefits expected reduction due to resolutions of open tax matters		258
Unrecognized Tax Benefits that Would Impact Effective Tax Rate		$ 100
Subsequent Event [Member]
Income Tax [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%
Cash and Cash Equivalents [Member]
Income Tax [Line Items]
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Percent		15.50%
Residual Earnings [Member]
Income Tax [Line Items]
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Percent		8.00%
Minimum | Scenario, Forecast [Member]
Income Tax [Line Items]
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Percent	13.00%
Maximum | Scenario, Forecast [Member]
Income Tax [Line Items]
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Percent	16.00%