Income Taxes (Tables)

12 Months Ended

Dec. 31, 2018

Income Tax Disclosure [Abstract]

Schedule of Income before Income Tax, Domestic and Foreign

Income before provision for income taxes consists of the following (in millions):

	Year Ended December 31,
	2018		2017		2016
Domestic	$	7,074	$	8,099	$	7,646
Foreign	725		5,430		9,451
Total income before provision for income taxes	$	7,799	$	13,529	$	17,097

Schedule Of Provision For Income Taxes

The provision for income taxes consists of the following (in millions):

	Year Ended December 31,
	2018			2017			2016
Federal:
Current	$	1,716		$	8,817		$	3,351
Deferred	324			(123		)	(85		)
	2,040			8,694			3,266
State:
Current	162			97			131
Deferred	(17		)	(20		)	28
	145			77			159
Foreign:
Current	175			54			261
Deferred	(21		)	60			(77		)
	154			114			184
Provision for income taxes	$	2,339		$	8,885		$	3,609

Schedule Of Difference Between Provision For Income Taxes And Federal Statutory Income Tax Rate To Income Before Provision For Income Taxes

The reconciliation between the federal statutory tax rate applied to income before taxes and our effective tax rate is summarized as follows:

	Year Ended December 31,
	2018		2017		2016
Federal statutory rate	21.0	%	35.0	%	35.0	%
State taxes, net of federal benefit	0.6	%	0.1	%	0.7	%
Foreign earnings at different rates	(0.9	)%	(11.2	)%	(16.0	)%
Research and other credits	(1.1	)%	(0.6	)%	(0.7	)%
US tax on foreign earnings	2.1	%	1.2	%	0.7	%
Deferred tax charge on acquired intangibles	7.5	%	—	%	—	%
Transition tax	(0.7	)%	42.9	%	—	%
Deferred tax revaluation	0.8	%	(2.3	)%	—	%
Settlement of tax examinations	(1.9	)%	—	%	—	%
Other	2.6	%	0.6	%	1.4	%
Effective tax rate	30.0	%	65.7	%	21.1	%

Schedule of Deferred Tax Assets and Liabilities

Significant components of our deferred tax assets and liabilities are as follows (in millions):

	December 31,
	2018			2017
Deferred tax assets:
Net operating loss carryforwards	$	344		$	322
Stock-based compensation	163			165
Reserves and accruals not currently deductible	426			336
Deferred revenue	—			27
Depreciation related	61			56
Research and other credit carryforwards	363			293
Other, net	183			102
Total deferred tax assets before valuation allowance	1,540			1,301
Valuation allowance	(331		)	(162		)
Total deferred tax assets	1,209			1,139
Deferred tax liabilities:
Intangibles	(1,667		)	(1,316		)
Other	(80		)	(70		)
Total deferred tax liabilities	(1,747		)	(1,386		)
Net deferred tax assets (liabilities)	$	(538	)	$	(247	)

Schedule Of Unrecognized Tax Benefits Roll Forward

The following is a rollforward of our total gross unrecognized tax benefits (in millions):

	December 31,
	2018			2017			2016
Balance, beginning of period	$	2,181		$	1,852		$	1,350
Tax positions related to current year:
Additions	64			299			522
Reductions	—			—			—
Tax positions related to prior years:
Additions	125			67			33
Reductions	—			(16		)	(3		)
Settlements	(774		)	(12		)	(49		)
Lapse of statute of limitations	(1		)	(9		)	(1		)
Balance, end of period	$	1,595		$	2,181		$	1,852