| **Quarterly Financial And Market Information (Tables)** | 12 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
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| **Quarterly Financial Data [Abstract]**                 |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
| Summary Of Quarterly Financial And Market Information   |  Quarter Ended YearEnded(In millions, except per share data)June 30 September 30 December 31 March 31 Fiscal 2014 Consolidated         Net revenue$949 $695 $808 $1,123 $3,575Gross profit755 282 291 900 2,228Operating income (loss)233 (252) (292) 344 33Net income (loss)222(a) (273)(b)(308)(c)367(d)8Common Stock         Net income (loss) per share — Basic$0.73 $(0.89) $(1.00) $1.18 $0.03Net income (loss) per share — Diluted$0.71 $(0.89) $(1.00) $1.15 $0.03Common stock price per share         High$23.61 $27.99 $26.44 $30.25 $30.25Low$16.91 $23.18 $20.97 $21.54 $16.91Fiscal 2013 Consolidated         Net revenue$955 $711 $922 $1,209 $3,797Gross profit750 266 493 900 2,409Operating income (loss)215 (364) (39) 309 121Net income (loss)201(e)(381)(f)(45)(g)323(h)98Common Stock         Net income (loss) per share — Basic$0.63 $(1.21) $(0.15) $1.07 $0.32Net income (loss) per share — Diluted$0.63 $(1.21) $(0.15) $1.05 $0.31Common stock price per share         High$16.71 $14.50 $15.42 $19.34 $19.34Low$11.89 $10.94 $11.91 $13.70 $10.94(a)Net income includes restructuring charges of $1 million and $7 million of acquisition-related contingent consideration, both of which are pre-tax amounts.(b)Net loss includes restructuring charges of $(2) million and $(44) million of acquisition-related contingent consideration, both of which are pre-tax amounts.(c)Net loss includes pre-tax restructuring charges of $(1) million.(d)Net income includes restructuring charges of $1 million and $2 million of acquisition-related contingent consideration, both of which are pre-tax amounts.(e)Net income includes restructuring charges of $27 million and $(20) million of acquisition-related contingent consideration, both of which are pre-tax amounts.(f)Net loss includes pre-tax restructuring charges of $(2) million.(g)Net loss includes $(45) million of acquisition-related contingent consideration, $(14) million gain on strategic investments, net, $6 million of impairment charges on acquisition-related intangible assets, and restructuring charges of $2 million, all of which are pre-tax amounts.(h)Net income includes $31 million of impairment charges on acquisition-related intangible assets, $(25) million of gain on strategic investments, net, and $1 million of acquisition-related contingent consideration, both of which are pre-tax amounts. |

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| - Definition
Tabular disclosure of the quarterly financial data in the annual financial statements. The disclosure includes financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income (loss) before extraordinary items and cumulative effect of a change in accounting principle and earnings per share data.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=25249566&loc=d3e1280-108306
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