XML 27 R73.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Debt (Additional Information On Variable Rate Debt) (Details) | Dec. 31, 2011 | Dec. 31, 2010
--- | --- | ---
Receivables Credit Facility [Member] |  |
Debt Instrument [Line Items] |  |
Reference Interest Rate | 0.30% | 0.26%
Applicable Margin | 0.85 | 1.30
Senior Credit Facility [Member] |  |
Debt Instrument [Line Items] |  |
Reference Interest Rate | 0.58% |
Applicable Margin | 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: | xbrli:pureItemType
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