Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended	12 Months Ended
	Apr. 01, 2018	Apr. 01, 2018	Sep. 30, 2018
Income Tax Contingency [Line Items]
Net income tax benefit for provisional remeasurement of certain deferred taxes and related amounts	$ (76)
Provisional of income tax expense for estimated effects of transition tax, net of adjustments related to uncertain tax positions	26	$ 238
Forecast [Member]
Income Tax Contingency [Line Items]
Corporate income tax blended rate			24.50%
Other Long-Term Liabilities [Member]
Income Tax Contingency [Line Items]
Provisional of income tax expense for estimated effects of transition tax, net of adjustments related to uncertain tax positions	$ 246