Income Tax Expense (Benefit) - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended		12 Months Ended
	Dec. 28, 2018	Sep. 28, 2018	Dec. 29, 2017	Dec. 28, 2018	Dec. 29, 2017	Jun. 29, 2018
Income Tax Disclosure [Line Items]
Tax cuts and jobs Act of 2017, change in tax rate, income tax expense (benefit) provisional amount						$ (65)
U.S. Federal statutory rate					28.00%
Tax cuts and jobs act of 2017, transition tax for accumulated foreign earnings, liability, incomplete accounting, provisional amount	$ 1,360				$ 1,660	1,570
Effective tax rate excluding Tax Act items					4.00%
Windfall tax benefits			$ 5		$ 27
Tax on foreign earnings held in cash, percentage				15.50%
Tax on other specified assets, percentage				8.00%
Tax cuts and jobs act of 2017, transition tax for accumulated foreign earnings, liability, increase (decrease)	$ 95	$ (302)		$ 135
Tax cuts and jobs act of 2017, change in tax rate, deferred tax asset, income tax expense (benefit)		$ (250)
Tax cuts and jobs act of 2017, incomplete accounting, change in tax rate, deferred taxes, provisional income tax (expense) benefit				$ 52		$ 52
Effective tax rate	701.00%		206.00%	96.00%	110.00%	28.00%
Tax cuts and jobs act of 2017, transition tax for accumulated foreign earnings, income tax expense (benefit), incomplete accounting, provisional amount				$ 242
Foreign tax credit	$ 82			82
Income tax expense (benefit)	568		$ 1,597	640	$ 1,626
Valuation allowance, deferred tax asset, increase (decrease), amount				(45)
Discrete effects related to mandatory deemed repatriation tax	230			178
Discrete effects related to change in indefinite reinvestment assertion	134			144
Increase in unrecognized tax benefits				139
Unrecognized tax benefits	690			690
Unrecognized tax benefits, income tax penalties and interest accrued	$ 116			116
State and Local Jurisdiction
Income Tax Disclosure [Line Items]
Income tax expense (benefit)				$ 54
Maximum
Income Tax Disclosure [Line Items]
Deferred tax assets, projected effective rate at which position will reverse	29.00%			29.00%
Minimum
Income Tax Disclosure [Line Items]
Deferred tax liabilities, projected effective rate at which position will reverse	22.00%			22.00%
Internal Revenue Service (IRS)
Income Tax Disclosure [Line Items]
Federal tax related to adjustments for transfer pricing				$ 535
Internal Revenue Service (IRS) | Tax Year 2008 Through 2009 [Member]
Income Tax Disclosure [Line Items]
Federal tax, subject to interest				516
Internal Revenue Service (IRS) | Tax Years 2010 Through 2012 [Member]
Income Tax Disclosure [Line Items]
Federal tax, subject to interest				$ 549