Income Taxes (Details) - USD ($) $ in Millions		3 Months Ended			9 Months Ended		36 Months Ended
	Jan. 15, 2020	Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2013	Dec. 31, 2019
Income Tax Contingency [Line Items]
Unrecognized tax benefits		$ 8,420			$ 8,420			$ 7,860
Unrecognized tax benefits that would result in tax benefit if realized		4,620			4,620
Accrued interest and penalties		833			833			$ 747
Cumulative income tax expense		287	$ 1,238		$ 2,198	$ 4,507
Internal Revenue Service (IRS) | Tax Year 2010
Income Tax Contingency [Line Items]
Income tax examination, estimate of possible loss	$ 9,000
Internal Revenue Service (IRS) | Tax Years 2011 Through 2013
Income Tax Contingency [Line Items]
Income tax examination, estimate of possible loss							$ 680
Altera Corp V Commissioner
Income Tax Contingency [Line Items]
Cumulative income tax expense				$ 1,110
Tax Election To Capitalize Research And Development Expenses
Income Tax Contingency [Line Items]
Cumulative income tax expense		913
Increase in current income tax liability		746
Deferred tax asset		$ 1,660