Income Taxes (Details) - USD ($) $ in Millions		1 Months Ended	3 Months Ended			25 Months Ended
	Jan. 15, 2020	Nov. 30, 2019	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Mar. 31, 2020	Dec. 31, 2019
Income Tax Contingency [Line Items]
Unrecognized tax benefits			$ 8,150			$ 8,150	$ 7,860
Unrecognized tax benefits that would result in tax benefit if realized			4,860			4,860
Accrued interest and penalties			789			789	$ 747
Cumulative income tax expense			$ 959		$ 1,053
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
Payments for other taxes		$ 1,640