Income Tax Expense - Additional Information (Details) - USD ($) $ in Millions			1 Months Ended	3 Months Ended	9 Months Ended
	Dec. 10, 2018	Jun. 28, 2018	Mar. 31, 2021	Apr. 02, 2021	Apr. 02, 2021	Sep. 30, 2020	May 04, 2020
Income Tax Disclosure [Line Items]
Increase to unrecognized tax benefits as a result of ongoing discussions with various taxing authorities				$ 35	$ 35
Decrease to unrecognized tax benefits resulting from restructuring activities				22	22
Net tax deficiencies				11	11
Additional tax expense from re-measurement of deferred tax liabilities				10	10
Unrecognized tax benefits				750	750
Penalties and interest accrued on unrecognized tax benefits				133	133
Potential payables related to unrecognized tax benefits				$ 743	$ 743
Internal Revenue Service (IRS) | Tax Year 2008 Through 2009
Income Tax Disclosure [Line Items]
Federal tax, subject to interest		$ 516
Internal Revenue Service (IRS) | Tax Years 2010 Through 2012
Income Tax Disclosure [Line Items]
Federal tax related to adjustments for transfer pricing	$ 535
Penalties asserted							$ 340
Internal Revenue Service (IRS) | Tax Years 2013 Through 2015
Income Tax Disclosure [Line Items]
Additional tax						$ 343
Penalties asserted			$ 109