Goodwill, Customer Relationships and Other Intangible Assets, Roll forward (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Goodwill [rollforward]
As of January 3, 2013			$ 21,627
Acquisitions			139
Impairment	0	(1,100)	(1,092)	0	0
As of December 31, 2013	20,674		20,674	21,627
Consumer
Goodwill [rollforward]
As of January 3, 2013			10,348
Acquisitions			0
Impairment			0
As of December 31, 2013	10,348		10,348
Business
Goodwill [rollforward]
As of January 3, 2013			6,363
Acquisitions			0
Impairment			0
As of December 31, 2013	6,363		6,363
Wholesale
Goodwill [rollforward]
As of January 3, 2013			3,274
Acquisitions			0
Impairment			0
As of December 31, 2013	3,274		3,274
Data hosting
Goodwill [rollforward]
As of January 3, 2013			1,642
Acquisitions			139
Impairment			(1,092)
As of December 31, 2013	$ 689		$ 689