XML 69 R94.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Alternative Energy Tax Credits - Additional Information (Detail) (USD $) | 12 Months Ended | 3 Months Ended | 12 Months Ended |  | 3 Months Ended | 12 Months Ended |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Mar. 31, 2012 Alternative Fuel Mixture Credits | Dec. 31, 2010 Alternative Fuel Mixture Credits | Dec. 31, 2009 Alternative Fuel Mixture Credits | Dec. 31, 2012 Cellulosic Biofuel Tax Credits | Mar. 31, 2012 Cellulosic Biofuel Tax Credits | Dec. 31, 2010 Cellulosic Biofuel Tax Credits | Dec. 31, 2009 Cellulosic Biofuel Tax Credits | Mar. 31, 2012 Alternative Energy Tax Credits | Dec. 31, 2012 Alternative Energy Tax Credits | Dec. 31, 2010 Alternative Energy Tax Credits | Dec. 31, 2010 Alternative Energy Tax Credits Additional
Alternative Energy Tax Credits [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Refundable tax credit per gallon |  |  |  |  |  | $ 0.50 |  |  |  | $ 1.01 |  |  |  |
Alternative energy tax credits |  |  |  | 95,500,000 | (86,300,000) |  |  |  |  |  |  |  |  |
Provision for income taxes | 216,739,000 | 85,477,000 | (52,331,000) |  |  |  | 3,400,000 | (118,500,000) | 135,500,000 |  |  | 81,700,000 |  |
Expenses related to alternative energy tax credits |  |  |  |  |  |  |  |  |  |  |  |  |  | (1,600,000)
Uncertain tax positions |  |  | 102,000,000 |  |  |  |  |  |  |  |  |  |  |
Income (charge) related to alternative energy tax credits |  |  |  |  |  |  |  |  |  |  | $ (23,000,000) | $ (19,600,000) | $ 47,700,000 |

X
- Definition Represents the net income impact from the alternative energy tax credits. + References No definition available. + Details
Name: | pkg_AlternativeEnergyTaxCredits
Namespace Prefix: | pkg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | pkg_AlternativeEnergyTaxCreditsLineItems
Namespace Prefix: | pkg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The total amount of tax credits earned for the production and use of alternative fuels in an entity's trade or business. + References No definition available. + Details
Name: | pkg_AlternativeFuelMixtureCredits
Namespace Prefix: | pkg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents expenses incurred related to the alternative energy tax credits. + References No definition available. + Details
Name: | pkg_ExpensesRelatedToAlternativeEnergyTaxCredits
Namespace Prefix: | pkg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the increase or decrease during the period in the reserve for uncertain tax positions. + References No definition available. + Details
Name: | pkg_IncreaseDecreaseDuringPeriodReserveForUncertainTaxPositions
Namespace Prefix: | pkg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Tax Credit Per Gallon + References No definition available. + Details
Name: | pkg_TaxCreditPerGallon
Namespace Prefix: | pkg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph a, b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Income Tax Expense (or Benefit) -URI http://asc.fasb.org/extlink&oid=6515339 + Details
Name: | us-gaap_IncomeTaxExpenseBenefit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration