Income Taxes

6 Months Ended

Jun. 30, 2021

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

The following table presents our provision for income taxes (in millions, except for effective tax rate):

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2020			2021			2020			2021
Provision for income taxes	$	1,318		$	3,460		$	2,239		$	6,813
Effective tax rate	15.9		%	15.7		%	14.0		%	15.7		%

We are subject to income taxes in the U.S. and foreign jurisdictions. Significant judgment is required in evaluating our uncertain tax positions and determining our provision for income taxes. Our total gross unrecognized tax benefits were $3.8 billion and $4.6 billion as of December 31, 2020 and June 30, 2021, respectively. Our total unrecognized tax benefits that, if recognized, would affect our effective tax rate were $2.6 billion and $3.2 billion as of December 31, 2020 and June 30, 2021, respectively. Although the timing of the resolution, settlement, and closure of audits is not certain, we do not believe it is reasonably possible that our unrecognized tax benefits will materially change in the next 12 months.

For information regarding non-income taxes, see Note 9.