Income Taxes (Tables)

12 Months Ended

Dec. 31, 2016

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,
	2016		2015		2014
Domestic	$	7,646	$	7,953	$	6,678
Foreign	9,451		13,706		8,178
Total income before provision for income taxes	$	17,097	$	21,659	$	14,856

Schedule Of Provision For Income Taxes

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

	Year Ended December 31,
	2016			2015			2014
Federal:
Current	$	3,351		$	3,568		$	2,810
Deferred	(85		)	(313		)	(190		)
	3,266			3,255			2,620
State:
Current	131			158			152
Deferred	28			(21		)	(30		)
	159			137			122
Foreign:
Current	261			212			85
Deferred	(77		)	(51		)	(30		)
	184			161			55
Provision for income taxes	$	3,609		$	3,553		$	2,797

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,
	2016		2015		2014
Federal statutory rate	35.0	%	35.0	%	35.0	%
State taxes, net of federal benefit	0.7	%	0.5	%	0.6	%
Foreign earnings at different rates	(15.3	)%	(18.5	)%	(16.9	)%
Research and other credits	(0.7	)%	(0.7	)%	(0.9	)%
Net unbenefitted stock compensation	0.2	%	0.1	%	0.2	%
Other	1.2	%	—	%	0.8	%
Effective tax rate	21.1	%	16.4	%	18.8	%

Schedule of Deferred Tax Assets and Liabilities

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

	December 31,
	2016			2015
Deferred tax assets:
Net operating loss carryforwards	$	175		$	199
Stock-based compensation	212			222
Reserves and accruals not currently deductible	617			676
Deferred revenue	56			55
Depreciation related	88			63
Research and other credit carryforwards	147			135
Other, net	221			118
Total deferred tax assets before valuation allowance	1,516			1,468
Valuation allowance	(126		)	(6		)
Total deferred tax assets	1,390			1,462
Deferred tax liabilities:
Intangibles	(104		)	(280		)
Unremitted foreign earnings	—			—
Other	(31		)	(50		)
Total deferred tax liabilities	(135		)	(330		)
Net deferred tax assets	$	1,255		$	1,132

Schedule Of Unrecognized Tax Benefits Roll Forward

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

	December 31,
	2016			2015			2014
Balance, beginning of period	$	1,350		$	661		$	237
Tax positions related to current year:
Additions	522			675			430
Reductions	—			—			—
Tax positions related to prior years:
Additions	33			45			21
Reductions	(3		)	—			(20		)
Settlements	(49		)	(24		)	(5		)
Lapse of statute of limitations	(1		)	(7		)	(2		)
Balance, end of period	$	1,852		$	1,350		$	661