Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 segment	Jun. 30, 2013
Segment information
Number of operating segments (segments)			4
Other operating revenue	$ 4,541	$ 4,525	$ 9,079	$ 9,038
Expenses	3,886	3,810	7,771	7,541
OPERATING INCOME	655	715	1,308	1,497
Operating segments
Segment information
Other operating revenue	4,288	4,276	8,572	8,532
Expenses	2,118	2,041	4,217	3,969
OPERATING INCOME	2,170	2,235	4,355	4,563
Margin percentage (percent)	51.00%	52.00%	51.00%	53.00%
Consumer
Segment information
Other operating revenue	1,500	1,494	3,009	3,005
Expenses	599	574	1,182	1,123
OPERATING INCOME	901	920	1,827	1,882
Margin percentage (percent)	60.00%	62.00%	61.00%	63.00%
Intersegment expense reclassification adjustment		22		42
Business
Segment information
Other operating revenue	1,564	1,525	3,123	3,030
Expenses	972	912	1,938	1,769
OPERATING INCOME	592	613	1,185	1,261
Margin percentage (percent)	38.00%	40.00%	38.00%	42.00%
Intersegment expense reclassification adjustment		(22)		(42)
Wholesale
Segment information
Other operating revenue	866	910	1,728	1,816
Expenses	283	301	559	575
OPERATING INCOME	583	609	1,169	1,241
Margin percentage (percent)	67.00%	67.00%	68.00%	68.00%
Hosting
Segment information
Other operating revenue	358	347	712	681
Expenses	264	254	538	502
OPERATING INCOME	94	93	174	179
Margin percentage (percent)	26.00%	27.00%	24.00%	26.00%
Intersegment expense reclassification adjustment		$ (21)		$ (39)

The amount of a reclassification adjustment made to prior period segment expense amounts.

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- Definition

Represents the operating margin assigned to segments for the period.

+ References

No definition available.

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- Definition

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

+ References

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- Definition

Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense.

+ References

No definition available.

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- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ References

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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

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