Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in Carrying Amount of Goodwill

The changes in the carrying amount of goodwill for the years ended December 31, 2016 and 2015 are as follows (in millions):

Balance as of December 31, 2014	$	17,981
Goodwill acquired	45
Balance as of December 31, 2015	$	18,026
Goodwill acquired	95
Effect of currency translation adjustment	1
Balance as of December 31, 2016	$	18,122

Schedule of Finite-Lived Intangible Assets

Intangible assets consist of the following (in millions):

		December 31, 2016							December 31, 2015
	Weighted-Average Remaining Useful Lives (in years)	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Finite-lived intangible assets:
Acquired users	4.8	$	2,056	$	(678	)	$	1,378	$	2,056	$	(382	)	$	1,674
Acquired technology	2.4	931		(518		)	413		831		(310		)	521
Acquired patents	5.9	785		(420		)	365		785		(333		)	452
Trade names	3.2	629		(293		)	336		629		(163		)	466
Other	3.3	162		(119		)	43		162		(89		)	73
Total finite-lived intangible assets	4.3	$	4,563	$	(2,028	)	$	2,535	$	4,463	$	(1,277	)	$	3,186
Indefinite-lived intangible assets:
In-process research and development (IPR&D)		$	—	$	—		$	—	$	60	$	—		$	60
Total intangible assets		$	4,563	$	(2,028	)	$	2,535	$	4,523	$	(1,277	)	$	3,246

Schedule of Indefinite-Lived Intangible Assets

Intangible assets consist of the following (in millions):

		December 31, 2016							December 31, 2015
	Weighted-Average Remaining Useful Lives (in years)	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Finite-lived intangible assets:
Acquired users	4.8	$	2,056	$	(678	)	$	1,378	$	2,056	$	(382	)	$	1,674
Acquired technology	2.4	931		(518		)	413		831		(310		)	521
Acquired patents	5.9	785		(420		)	365		785		(333		)	452
Trade names	3.2	629		(293		)	336		629		(163		)	466
Other	3.3	162		(119		)	43		162		(89		)	73
Total finite-lived intangible assets	4.3	$	4,563	$	(2,028	)	$	2,535	$	4,463	$	(1,277	)	$	3,186
Indefinite-lived intangible assets:
In-process research and development (IPR&D)		$	—	$	—		$	—	$	60	$	—		$	60
Total intangible assets		$	4,563	$	(2,028	)	$	2,535	$	4,523	$	(1,277	)	$	3,246

Estimated Amortization Expense for Unamortized Acquired Intangible Assets

As of December 31, 2016, expected amortization expense for the unamortized acquired intangible assets for the next five years and thereafter is as follows (in millions):

2017	$	687
2018	619
2019	526
2020	357
2021	265
Thereafter	81
Total	$	2,535