Income Taxes - Tax Loss and Credit Carryforwards (Details) - USD ($) $ in Millions	Sep. 27, 2019	Sep. 28, 2018
Tax loss and credit carryforward
Total tax loss and credit carryforwards	$ 6,041	$ 3,237
U.S. Federal
Tax loss and credit carryforward
Net operating loss carryforwards	528
Tax credit carryforwards	165
Capital loss carryforwards	1
U.S. State
Tax loss and credit carryforward
Net operating loss carryforwards	89
Tax credit carryforwards	24
Non-U.S. Jurisdictions
Tax loss and credit carryforward
Net operating loss carryforwards	5,205
Tax credit carryforwards	1
Capital loss carryforwards	28
Through Fiscal 2024
Tax loss and credit carryforward
Total tax loss and credit carryforwards	241
Through Fiscal 2024 | U.S. Federal
Tax loss and credit carryforward
Net operating loss carryforwards	128
Tax credit carryforwards	42
Capital loss carryforwards	1
Through Fiscal 2024 | U.S. State
Tax loss and credit carryforward
Net operating loss carryforwards	50
Tax credit carryforwards	8
Through Fiscal 2024 | Non-U.S. Jurisdictions
Tax loss and credit carryforward
Net operating loss carryforwards	12
Fiscal 2025 Through Fiscal 2039
Tax loss and credit carryforward
Total tax loss and credit carryforwards	3,973
Fiscal 2025 Through Fiscal 2039 | U.S. Federal
Tax loss and credit carryforward
Net operating loss carryforwards	359
Tax credit carryforwards	123
Fiscal 2025 Through Fiscal 2039 | U.S. State
Tax loss and credit carryforward
Net operating loss carryforwards	39
Tax credit carryforwards	13
Fiscal 2025 Through Fiscal 2039 | Non-U.S. Jurisdictions
Tax loss and credit carryforward
Net operating loss carryforwards	3,437
Capital loss carryforwards	2
No Expiration
Tax loss and credit carryforward
Total tax loss and credit carryforwards	1,827
No Expiration | U.S. Federal
Tax loss and credit carryforward
Net operating loss carryforwards	41
No Expiration | U.S. State
Tax loss and credit carryforward
Tax credit carryforwards	3
No Expiration | Non-U.S. Jurisdictions
Tax loss and credit carryforward
Net operating loss carryforwards	1,756
Tax credit carryforwards	1
Capital loss carryforwards	$ 26