XML 121 R74.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Additional Information on Variable Rate Debt (Detail) | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | ---
Receivables Credit Facility |  |
Debt Instrument [Line Items] |  |
Reference Interest Rate | 0.21% | 0.30%
Applicable Margin | 0.85% | 0.85%
Senior Credit Facility |  |
Debt Instrument [Line Items] |  |
Reference Interest Rate | 0.21% | 0.58%
Applicable Margin | 1.50% | 1.50%

X
- Definition Represents the applicable margin for the debt instrument at the end of the period. + References No definition available. + Details
Name: | pkg_LongTermDebtApplicableMargin
Namespace Prefix: | pkg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the reference interest rate for the debt instrument at the end of the period. + References No definition available. + Details
Name: | pkg_ReferenceInterestRate
Namespace Prefix: | pkg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration