Income Taxes (Unaudited) (Details 1) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2019	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Federal and foreign income tax expense		$ 160	$ 257	$ 292	$ 395
Effective income tax rate		18.80%	31.70%	17.00%	24.70%
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent				21.00%			35.00%
Effective Income Tax Rate Reconciliation, Increase in Research Tax Credits		$ (22)
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount				$ (26)	$ (47)
Effective Income Tax Rate Reconciliation, Tax Settlement, Amount					(42)
Income Tax Reconciliation, Deduction, Increase in Qualified Production Activity					$ (31)
Income Tax Contingency [Line Items]
Decrease in Unrecognized Tax Benefits is Reasonably Possible	$ 115	115		115
Unrecognized Tax Benefits, Increase Resulting from Acquisition	150
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions		50
Increase in Unrecognized Tax Benefits resulting from 2017 Tax Act is Reasonably Possible	100	100		100
Scenario, Forecast [Member] | Maximum [Member]
Income Tax Contingency [Line Items]
Tax Adjustments, Settlements, and Unusual Provisions						$ (30)
Innovation Systems [Member]
Income Tax Contingency [Line Items]
Decrease in Unrecognized Tax Benefits is Reasonably Possible	$ 35	$ 35		$ 35
Innovation Systems [Member] | Scenario, Forecast [Member] | Maximum [Member]
Income Tax Contingency [Line Items]
Tax Adjustments, Settlements, and Unusual Provisions						$ (30)