Income Taxes (Details Textuals) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Contingency [Line Items]
U.S. statutory federal income tax rate	21.00%	21.00%	21.00%
Accumulated earnings intended to be permanently reinvested outside the U.S.	$ 1,000
Aggregate state income and foreign withholding taxes on foreign earnings	100
Income taxes paid	2,200	$ 1,700	$ 2,000
Unrecognized tax benefits	790	726	701	$ 821
Unrecognized tax benefits that affect effective tax rate	580	623	599
Unrecognized tax benefits change as a result of potential resolutions of prior years' tax	130
Unrecognized tax benefits that, if recognized, could impact effective tax rate	110
Unrecognized tax benefits income tax penalties and interest expense	260	5	$ (18)
Unrecognized tax benefits income tax penalties and interest accrued	350	$ 70
U.S. [Member]
Income Tax Contingency [Line Items]
NOL carryforwards	140
Non U.S. [Member]
Income Tax Contingency [Line Items]
NOL carryforwards	1,000
FTC carryforwards	$ 100
Earliest Year [Member]
Income Tax Contingency [Line Items]
Tax audit settlement years			2008
Latest Year [Member]
Income Tax Contingency [Line Items]
Tax audit settlement years			2014