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Nature Of Business (Details) |  | 1 Months Ended |  | 12 Months Ended | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2011 | Apr. 30, 2009 USW [Member] years | Aug. 31, 2008 USW [Member] years | Dec. 31, 2011 Other Unions [Member] | Dec. 31, 2011 Minimum [Member] USW [Member] | Dec. 31, 2011 Minimum [Member] Other Unions [Member] | Dec. 31, 2011 Minimum [Member] Contracts For Unionized Corrugated Products Plant Employees [Member] | Dec. 31, 2011 Maximum [Member] USW [Member] | Dec. 31, 2011 Maximum [Member] Other Unions [Member] | Dec. 31, 2011 Maximum [Member] Contracts For Unionized Corrugated Products Plant Employees [Member] | Dec. 31, 2011 Kraft Linerboard Mills [Member] | Dec. 31, 2011 Medium Mills [Member] | Dec. 31, 2011 Corrugated Plants [Member] | Apr. 30, 2009 Corrugated Plants [Member] USW [Member] | Dec. 31, 2011 Combining Plants [Member] | Dec. 31, 2011 Sheet Plants [Member] | Dec. 31, 2011 Technical And Development Centers [Member] | Dec. 31, 2011 Graphic Design Centers [Member] | Dec. 31, 2011 Salaried [Member] | Dec. 31, 2011 Hourly [Member]
Nature Of Business [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of plants |  |  |  |  |  |  |  |  |  |  | 2 | 2 | 71 | 25 | 41 | 30 | 1 | 6 |  |
Total number of employees of PCA | 8,300 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,500 | 5,800
Percentage of hourly employees represented by unions | 75.00% |  | 88.00% | 12.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of contract years extended under labor agreement |  | 5 | 5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expiration date of labor agreement |  |  |  |  | September 2013 | June 2012 | February 2012 | June 2015 | October 2014 | December 2017 |  |  |  |  |  |  |  |  |  |

X
- Definition Number of persons employed by the Entity + References No definition available. + Details
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Data Type: | xbrli:decimalItemType
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X
- Definition Labor Agreement, Expiration Date + References No definition available. + Details
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- Details
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- Definition Number of contract years extended under labor agreement + References No definition available. + Details
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- Definition Represents the number of plants. + References No definition available. + Details
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- Definition Represents percentage of hourly employees represented by unions. + References No definition available. + Details
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