Income Taxes (Details 2) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	35.00%	35.00%
Increase in Research Tax Credit	$ 56	$ 69
Increase in Qualified Production Activity		39
Income taxes paid, net	270	517	$ 691
Income Tax Reconciliation (Table Amounts) [Abstract]
Income tax expense at statutory rate	786	1,480	938
Stock compensation - excess tax benefits	$ (27)	$ (48)	$ (85)
Stock compensation - excess tax benefits, Percent	(0.70%)	(1.10%)	(3.20%)
Research credit	$ (186)	$ (130)	$ (61)
Research credit, Percent	(5.00%)	(3.10%)	(2.20%)
Manufacturing deduction	$ 0	$ (97)	$ (58)
Manufacturing deduction, Percent	(0.00%)	(2.30%)	(2.20%)
Settlements with taxing authorities	$ 0	$ (42)	$ (40)
Settlements with taxing authorities, Percent	0.00%	(1.00%)	(1.50%)
Repatriation of non-U.S. earnings	$ 0	$ 0	$ (33)
Repatriation of non-U.S. earnings, Percent	0.00%	0.00%	(1.20%)
Impacts related to the 2017 Tax Act	$ (84)	$ 285	$ 0
Impacts related to the 2017 Tax Act, Percent	(2.20%)	6.80%	0.00%
Effective Tax Rate Reconciliation, Mark-to-Market benefit tax rate differential, amount	$ 0	$ (72)	$ 0
Effective Tax Rate Reconciliation, Mark-to-Market benefit tax rate differential, percent	0.00%	(1.70%)	0.00%
Other, net	$ 24	$ (16)	$ (23)
Other net, Percent	0.60%	(0.40%)	(0.90%)
Total federal and foreign income tax expense	$ 513	$ 1,360	$ 638
Effective income tax rate	13.70%	32.20%	23.80%