No definition available.

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

+ References

No definition available.

+ Details

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- Definition

Unrecognized cost of unvested options awarded to employees as compensation.

+ References

No definition available.

+ Details

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- Definition

Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)(2)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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Stock-Based Compensation (Other Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Stock-based compensation by award type [Line Items]
Stock option term until expiration	8 years
Aggregate fair value of RSUs vested during the period	$ 212	$ 319	$ 324
Restricted Stock Units (RSUs) [Member]
Unrecognized Stock-based Compensation [Abstract]
Unrecognized future expense of unvested RSUs	$ 198
Weighted average period over which future expense of unrecognized stock-based compensation will be recognized (years)	2 years 3 months 18 days
Restricted Stock Units (RSUs) [Member] \| Maximum [Member]
Stock-based compensation by award type [Line Items]
Service period over which grants vest	4 years
Restricted Stock Units (RSUs) [Member] \| Minimum [Member]
Stock-based compensation by award type [Line Items]
Service period over which grants vest	1 year
Stock Options [Member]
Unrecognized Stock-based Compensation [Abstract]
Unrecognized future expense of unvested stock options	$ 51
Weighted average period over which future expense of unrecognized stock-based compensation will be recognized (years)	2 years 4 months 24 days
Stock Options [Member] \| Maximum [Member]
Stock-based compensation by award type [Line Items]
Service period over which grants vest	4 years
Stock Options [Member] \| Minimum [Member]
Stock-based compensation by award type [Line Items]
Service period over which grants vest	3 years