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v3.5.0.2

Subsequent Events (Details) - Subsequent Event ton in Millions, $ in Millions |  | 1 Months Ended
--- | --- | ---
Oct. 11, 2016 USD ($) Fulfillment_center | Oct. 31, 2016 ton
Subsequent Event [Line Items] |  |
Number of fulfillment centers | Fulfillment_center | 5 |
Columbus Container Inc |  |
Subsequent Event [Line Items] |  |
Cash purchase price | $ | $ 100 |
Wallula, Washington Mill |  |
Subsequent Event [Line Items] |  |
Pulp capacity (in tons) | ton |  | 0.1

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- Definition Number of Fulfillment Centers + References No definition available. + Details
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Namespace Prefix: | pkg_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Pulp Capacity + References No definition available. + Details
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Namespace Prefix: | pkg_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3213-108585 + Details
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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_BusinessAcquisitionAxis=pkg_ColumbusContainerIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |