| **Earnings Per Share - (Tables)**                                             | 12 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
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| **Earnings Per Share [Abstract]**                                             |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
| Number of shares used for calculation of basic and diluted earnings per share | A reconciliation of the number of shares used for the basic and diluted loss or earnings per share (“EPS”) computations is as follows for the years ended December 31: 2015 2014 2013Weighted average common shares outstanding for basic EPS438 437 443Effect of dilutive securities - stock plans— 2 1Adjusted weighted average common shares outstanding for diluted EPS438 439 444      Anti-dilutive shares excluded from diluted EPS (1)2 — —Future potentially dilutive shares excluded from diluted EPS (2)3 2 4(1) The calculation of diluted net loss per share for 2015, excludes shares potentially issuable under stock-based incentive compensation plans and the employee stock purchase plan, as their effect, if included, would have been anti-dilutive.(2) Options where the exercise price exceeds the average market price are excluded from the calculation of diluted net loss or earnings per share because their effect would be anti-dilutive. |

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| - References
No definition available.
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| - Definition
Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit).
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257
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