Goodwill, Customer Relationships and Other Intangible Assets (Details 4) - USD ($) $ in Millions		12 Months Ended
	Nov. 01, 2014	Dec. 31, 2015	Dec. 31, 2014
Goodwill [rollforward]
Goodwill at the beginning of the period		$ 20,755	$ 20,674
Purchase accounting adjustments		(13)	(11)
November 1, 2014 reorganization	$ 0
Acquisitions			92
Goodwill at the end of the period		20,742	20,755
Business
Goodwill [rollforward]
Goodwill at the beginning of the period		10,477	6,363
Purchase accounting adjustments		(13)	0
November 1, 2014 reorganization	4,022
Acquisitions			92
Goodwill at the end of the period		10,464	10,477
Consumer
Goodwill [rollforward]
Goodwill at the beginning of the period		10,278	10,348
Purchase accounting adjustments		0	0
November 1, 2014 reorganization	(70)
Acquisitions			0
Goodwill at the end of the period		10,278	10,278
Wholesale
Goodwill [rollforward]
Goodwill at the beginning of the period		0	3,274
Purchase accounting adjustments		0	0
November 1, 2014 reorganization	(3,274)
Acquisitions			0
Goodwill at the end of the period		0	0
Hosting
Goodwill [rollforward]
Goodwill at the beginning of the period		0	689
Purchase accounting adjustments		0	(11)
November 1, 2014 reorganization	$ (678)
Acquisitions			0
Goodwill at the end of the period		$ 0	$ 0