Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Tax Disclosure [Abstract]
Expense (provision) for income taxes	$ (226)	$ (134)
Effective income tax rate	19.60%	20.70%
Discrete tax expense (benefit)	$ (21)
Benefit from loss on extinguishment of debt, loss on marketable securities and other discrete tax items	$ 25
Benefit from restructuring and other corporate matters, depreciation on abandoned technology and other discrete tax items		$ 54
Percentage point decrease in effective tax rate	1.90%
Decrease in uncertain tax positions	$ 50