Business Combinations (Schedule Of Intangible Assets Acquired) (Details) (Popcap [Member], USD $) In Millions, unless otherwise specified	1 Months Ended
Aug. 31, 2011 years
Business Acquisition [Line Items]
Gross carrying amount	$ 302
Weighted-average useful life (in years)	6
Developed And Core Technology [Member]
Business Acquisition [Line Items]
Gross carrying amount	245
Weighted-average useful life (in years)	6
Trade Names And Trademarks [Member]
Business Acquisition [Line Items]
Gross carrying amount	40
Weighted-average useful life (in years)	9
In-Process Research And Development [Member]
Business Acquisition [Line Items]
Gross carrying amount	15
Weighted-average useful life (in years)	5
Other Intangibles [Member]
Business Acquisition [Line Items]
Gross carrying amount	$ 2
Weighted-average useful life (in years)	4

The calculated weighted-average amortization period of a major class of finite-lived intangible assets acquired during the current period either individually or as part of a group of assets (in either an asset acquisition or business combination). A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 44

-Subparagraph a(3)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=6905858&loc=d3e16265-109275

Name:	us-gaap_AcquiredFiniteLivedIntangibleAssetWeightedAverageUsefulLife
Namespace Prefix:	us-gaap
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration