Income Taxes (Unaudited) (Details 2) - USD ($) $ in Millions	3 Months Ended		4 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2019
Income Tax Contingency [Line Items]
Increase to Income Tax Expense	$ 93	$ 139		$ 385	$ 534
Unrecognized Tax Benefits, Increase Resulting from Acquisition			$ 150
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions	25			75
Increase in Unrecognized Tax Benefits resulting from 2017 Tax Act is reasonably possible	100		100	100
Innovation Systems [Member]
Income Tax Contingency [Line Items]
Decrease in Unrecognized Tax Benefits is Reasonably Possible	35		35	35
Maximum | Scenario, Forecast [Member] | Innovation Systems [Member]
Income Tax Contingency [Line Items]
Tax Adjustments, Settlements, and Unusual Provisions						$ (30)
Undistributed Earnings subject to Transition tax on Foreign Earnings [Member]
Income Tax Contingency [Line Items]
Change in Deferred Tax Assets due to 2017 Tax Act	(5)		(5)	(5)
Increase to Income Tax Expense	5
Accelerated Depreciation [Member]
Income Tax Contingency [Line Items]
Change in Deferred Tax Assets due to 2017 Tax Act	17		17	17
Increase to Income Taxes Payable	$ 17		$ 17	$ 17