XML 47 R97.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Quarterly Financial Data - Additional Information (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Quarterly Financial Data [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 1,434.0 us-gaap_SalesRevenueNet | [1] | $ 1,518.9 us-gaap_SalesRevenueNet | [2] | $ 1,468.4 us-gaap_SalesRevenueNet | [3] | $ 1,431.3 us-gaap_SalesRevenueNet | [4] | $ 1,264.4 us-gaap_SalesRevenueNet | [5] | $ 845.5 us-gaap_SalesRevenueNet | [6] | $ 800.2 us-gaap_SalesRevenueNet | [7] | $ 755.2 us-gaap_SalesRevenueNet | $ 5,852.6 us-gaap_SalesRevenueNet |  | $ 3,665.3 us-gaap_SalesRevenueNet |  | $ 2,843.9 us-gaap_SalesRevenueNet |
Gross profit | 297.0 us-gaap_GrossProfit | [1] | 320.3 us-gaap_GrossProfit | [2] | 310.8 us-gaap_GrossProfit | [3] | 301.4 us-gaap_GrossProfit | [4] | 259.4 us-gaap_GrossProfit | [5] | 227.6 us-gaap_GrossProfit | [6] | 195.3 us-gaap_GrossProfit | [7] | 185.2 us-gaap_GrossProfit | 1,229.5 us-gaap_GrossProfit |  | 867.5 us-gaap_GrossProfit |  | 634.7 us-gaap_GrossProfit |
Operating Income (Loss) | 173.2 us-gaap_OperatingIncomeLoss | [1] | 188.4 us-gaap_OperatingIncomeLoss | [2] | 180.2 us-gaap_OperatingIncomeLoss | [3] | 160.9 us-gaap_OperatingIncomeLoss | [4] | 122.9 us-gaap_OperatingIncomeLoss | [5] | 142.8 us-gaap_OperatingIncomeLoss | [6] | 110.2 us-gaap_OperatingIncomeLoss | [7] | 106.0 us-gaap_OperatingIncomeLoss | 702.7 us-gaap_OperatingIncomeLoss |  | 481.9 us-gaap_OperatingIncomeLoss | [8] | 437.6 us-gaap_OperatingIncomeLoss |
Net income | 98.5 us-gaap_NetIncomeLoss | [1] | 104.4 us-gaap_NetIncomeLoss | [2] | 99.6 us-gaap_NetIncomeLoss | [3] | 90.1 us-gaap_NetIncomeLoss | [4] | 228.1 us-gaap_NetIncomeLoss | [5] | 84.7 us-gaap_NetIncomeLoss | [6] | 66.2 us-gaap_NetIncomeLoss | [7] | 62.3 us-gaap_NetIncomeLoss | 392.6 us-gaap_NetIncomeLoss |  | 441.3 us-gaap_NetIncomeLoss |  | 160.2 us-gaap_NetIncomeLoss |
Basic income per common share | $ 1.00 us-gaap_EarningsPerShareBasic | [1] | $ 1.06 us-gaap_EarningsPerShareBasic | [2] | $ 1.01 us-gaap_EarningsPerShareBasic | [3] | $ 0.92 us-gaap_EarningsPerShareBasic | [4] | $ 2.36 us-gaap_EarningsPerShareBasic | [5] | $ 0.88 us-gaap_EarningsPerShareBasic | [6] | $ 0.69 us-gaap_EarningsPerShareBasic | [7] | $ 0.65 us-gaap_EarningsPerShareBasic | $ 3.99 us-gaap_EarningsPerShareBasic |  | $ 4.57 us-gaap_EarningsPerShareBasic |  | $ 1.66 us-gaap_EarningsPerShareBasic |
Diluted income per common share | $ 1.00 us-gaap_EarningsPerShareDiluted | [1] | $ 1.06 us-gaap_EarningsPerShareDiluted | [2] | $ 1.01 us-gaap_EarningsPerShareDiluted | [3] | $ 0.92 us-gaap_EarningsPerShareDiluted | [4] | $ 2.34 us-gaap_EarningsPerShareDiluted | [5] | $ 0.87 us-gaap_EarningsPerShareDiluted | [6] | $ 0.68 us-gaap_EarningsPerShareDiluted | [7] | $ 0.64 us-gaap_EarningsPerShareDiluted | $ 3.99 us-gaap_EarningsPerShareDiluted |  | $ 4.52 us-gaap_EarningsPerShareDiluted |  | $ 1.64 us-gaap_EarningsPerShareDiluted |
Stock price - high | $ 80.14 pkg_HighStockPricePerShare |  | $ 72.82 pkg_HighStockPricePerShare |  | $ 72.74 pkg_HighStockPricePerShare |  | $ 75.10 pkg_HighStockPricePerShare |  | $ 64.39 pkg_HighStockPricePerShare |  | $ 61.32 pkg_HighStockPricePerShare |  | $ 50.78 pkg_HighStockPricePerShare |  | $ 44.93 pkg_HighStockPricePerShare | $ 80.14 pkg_HighStockPricePerShare |  | $ 64.39 pkg_HighStockPricePerShare |  |  |
Stock price - low | $ 57.06 pkg_LowStockPricePerShare |  | $ 63.11 pkg_LowStockPricePerShare |  | $ 65.00 pkg_LowStockPricePerShare |  | $ 61.35 pkg_LowStockPricePerShare |  | $ 55.66 pkg_LowStockPricePerShare |  | $ 48.45 pkg_LowStockPricePerShare |  | $ 42.36 pkg_LowStockPricePerShare |  | $ 37.86 pkg_LowStockPricePerShare | $ 57.06 pkg_LowStockPricePerShare |  | $ 37.86 pkg_LowStockPricePerShare |  |  |
Provision (benefit) for income taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 221.7 us-gaap_IncomeTaxExpenseBenefit |  | (17.7)us-gaap_IncomeTaxExpenseBenefit |  | 214.5 us-gaap_IncomeTaxExpenseBenefit |
Interest expense, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (88.4)us-gaap_InterestIncomeExpenseNonoperatingNet | [9] | (58.3)us-gaap_InterestIncomeExpenseNonoperatingNet | [10],[8] | (62.9)us-gaap_InterestIncomeExpenseNonoperatingNet | [11]
Income before taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 614.3 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest |  | 423.6 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest | [8] | 374.7 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest |
Settled Litigation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Quarterly Financial Data [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Income (Loss) |  |  |  |  |  |  | (17.6)us-gaap_OperatingIncomeLoss / pkg_NonrecurringActivityAxis = us-gaap_SettledLitigationMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Decrease (Increase) in net income |  |  |  |  |  |  | 11.2 us-gaap_QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountAffectingComparability / pkg_NonrecurringActivityAxis = us-gaap_SettledLitigationMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Decrease (Increase) in net income per diluted share |  |  |  |  |  |  | $ 0.11 pkg_QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountPerDilutedShareAffectingComparability / pkg_NonrecurringActivityAxis = us-gaap_SettledLitigationMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
DeRidder Restructuring Costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Quarterly Financial Data [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Income (Loss) | (18.0)us-gaap_OperatingIncomeLoss / pkg_NonrecurringActivityAxis = us-gaap_RestructuringChargesMember |  | (26.0)us-gaap_OperatingIncomeLoss / pkg_NonrecurringActivityAxis = us-gaap_RestructuringChargesMember |  | (17.8)us-gaap_OperatingIncomeLoss / pkg_NonrecurringActivityAxis = us-gaap_RestructuringChargesMember |  | (4.0)us-gaap_OperatingIncomeLoss / pkg_NonrecurringActivityAxis = us-gaap_RestructuringChargesMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Decrease (Increase) in net income | 11.7 us-gaap_QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountAffectingComparability / pkg_NonrecurringActivityAxis = us-gaap_RestructuringChargesMember |  | 16.6 us-gaap_QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountAffectingComparability / pkg_NonrecurringActivityAxis = us-gaap_RestructuringChargesMember |  | 11.2 us-gaap_QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountAffectingComparability / pkg_NonrecurringActivityAxis = us-gaap_RestructuringChargesMember |  | 2.6 us-gaap_QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountAffectingComparability / pkg_NonrecurringActivityAxis = us-gaap_RestructuringChargesMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Decrease (Increase) in net income per diluted share | $ 0.12 pkg_QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountPerDilutedShareAffectingComparability / pkg_NonrecurringActivityAxis = us-gaap_RestructuringChargesMember |  | $ 0.17 pkg_QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountPerDilutedShareAffectingComparability / pkg_NonrecurringActivityAxis = us-gaap_RestructuringChargesMember |  | $ 0.12 pkg_QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountPerDilutedShareAffectingComparability / pkg_NonrecurringActivityAxis = us-gaap_RestructuringChargesMember |  | $ 0.02 pkg_QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountPerDilutedShareAffectingComparability / pkg_NonrecurringActivityAxis = us-gaap_RestructuringChargesMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-Cash Pension Curtailment Charge |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Quarterly Financial Data [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Income (Loss) |  |  |  |  |  |  |  |  |  |  | (3.1)us-gaap_OperatingIncomeLoss / pkg_NonrecurringActivityAxis = pkg_NonCashPensionCurtailmentChargeMember |  | (7.8)us-gaap_OperatingIncomeLoss / pkg_NonrecurringActivityAxis = pkg_NonCashPensionCurtailmentChargeMember |  |  |  |  |  |  |  |
Decrease (Increase) in net income |  |  |  |  |  |  |  |  |  |  | 2.0 us-gaap_QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountAffectingComparability / pkg_NonrecurringActivityAxis = pkg_NonCashPensionCurtailmentChargeMember |  | 5.0 us-gaap_QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountAffectingComparability / pkg_NonrecurringActivityAxis = pkg_NonCashPensionCurtailmentChargeMember |  |  |  |  |  |  |  |
Decrease (Increase) in net income per diluted share |  |  |  |  |  |  |  |  |  |  | $ 0.02 pkg_QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountPerDilutedShareAffectingComparability / pkg_NonrecurringActivityAxis = pkg_NonCashPensionCurtailmentChargeMember |  | $ 0.05 pkg_QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountPerDilutedShareAffectingComparability / pkg_NonrecurringActivityAxis = pkg_NonCashPensionCurtailmentChargeMember |  |  |  |  |  |  |  |
Alternative Energy Tax Credits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Quarterly Financial Data [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Provision (benefit) for income taxes |  |  |  |  |  |  |  |  | (166.0)us-gaap_IncomeTaxExpenseBenefit / pkg_NonrecurringActivityAxis = pkg_AlternativeFuelMixtureCreditsMember |  |  |  |  |  |  |  |  |  |  |  |
Decrease (Increase) in net income per diluted share |  |  |  |  |  |  |  |  | $ (1.70)pkg_QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountPerDilutedShareAffectingComparability / pkg_NonrecurringActivityAxis = pkg_AlternativeFuelMixtureCreditsMember |  |  |  |  |  |  |  |  |  |  |  |
Boise Inc. | Integration-Related and Other Costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Quarterly Financial Data [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Income (Loss) | (6.4)us-gaap_OperatingIncomeLoss / us-gaap_BusinessAcquisitionAxis = pkg_BoiseInc.Member / pkg_NonrecurringActivityAxis = pkg_IntegrationRelatedandOtherCostsMember |  |  |  | (4.9)us-gaap_OperatingIncomeLoss / us-gaap_BusinessAcquisitionAxis = pkg_BoiseInc.Member / pkg_NonrecurringActivityAxis = pkg_IntegrationRelatedandOtherCostsMember |  | (4.1)us-gaap_OperatingIncomeLoss / us-gaap_BusinessAcquisitionAxis = pkg_BoiseInc.Member / pkg_NonrecurringActivityAxis = pkg_IntegrationRelatedandOtherCostsMember |  | (17.4)us-gaap_OperatingIncomeLoss / us-gaap_BusinessAcquisitionAxis = pkg_BoiseInc.Member / pkg_NonrecurringActivityAxis = pkg_IntegrationRelatedandOtherCostsMember |  |  |  |  |  |  |  |  |  |  |  |
Income before taxes |  |  | (4.5)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest / us-gaap_BusinessAcquisitionAxis = pkg_BoiseInc.Member / pkg_NonrecurringActivityAxis = pkg_IntegrationRelatedandOtherCostsMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Decrease (Increase) in net income | 4.2 us-gaap_QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountAffectingComparability / us-gaap_BusinessAcquisitionAxis = pkg_BoiseInc.Member / pkg_NonrecurringActivityAxis = pkg_IntegrationRelatedandOtherCostsMember |  | 2.9 us-gaap_QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountAffectingComparability / us-gaap_BusinessAcquisitionAxis = pkg_BoiseInc.Member / pkg_NonrecurringActivityAxis = pkg_IntegrationRelatedandOtherCostsMember |  | 3.0 us-gaap_QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountAffectingComparability / us-gaap_BusinessAcquisitionAxis = pkg_BoiseInc.Member / pkg_NonrecurringActivityAxis = pkg_IntegrationRelatedandOtherCostsMember |  | 2.6 us-gaap_QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountAffectingComparability / us-gaap_BusinessAcquisitionAxis = pkg_BoiseInc.Member / pkg_NonrecurringActivityAxis = pkg_IntegrationRelatedandOtherCostsMember |  | 11.0 us-gaap_QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountAffectingComparability / us-gaap_BusinessAcquisitionAxis = pkg_BoiseInc.Member / pkg_NonrecurringActivityAxis = pkg_IntegrationRelatedandOtherCostsMember |  |  |  |  |  |  |  |  |  |  |  |
Decrease (Increase) in net income per diluted share | $ 0.04 pkg_QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountPerDilutedShareAffectingComparability / us-gaap_BusinessAcquisitionAxis = pkg_BoiseInc.Member / pkg_NonrecurringActivityAxis = pkg_IntegrationRelatedandOtherCostsMember |  | $ 0.03 pkg_QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountPerDilutedShareAffectingComparability / us-gaap_BusinessAcquisitionAxis = pkg_BoiseInc.Member / pkg_NonrecurringActivityAxis = pkg_IntegrationRelatedandOtherCostsMember |  | $ 0.03 pkg_QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountPerDilutedShareAffectingComparability / us-gaap_BusinessAcquisitionAxis = pkg_BoiseInc.Member / pkg_NonrecurringActivityAxis = pkg_IntegrationRelatedandOtherCostsMember |  | $ 0.03 pkg_QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountPerDilutedShareAffectingComparability / us-gaap_BusinessAcquisitionAxis = pkg_BoiseInc.Member / pkg_NonrecurringActivityAxis = pkg_IntegrationRelatedandOtherCostsMember |  | $ 0.11 pkg_QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountPerDilutedShareAffectingComparability / us-gaap_BusinessAcquisitionAxis = pkg_BoiseInc.Member / pkg_NonrecurringActivityAxis = pkg_IntegrationRelatedandOtherCostsMember |  |  |  |  |  |  |  |  |  |  |  |
Boise Inc. | Nonrecurring Acquisition-Related Costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Quarterly Financial Data [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Income (Loss) |  |  |  |  |  |  |  |  | (15.8)us-gaap_OperatingIncomeLoss / us-gaap_BusinessAcquisitionAxis = pkg_BoiseInc.Member / pkg_NonrecurringActivityAxis = pkg_NonrecurringAcquisitionRelatedCostsMember |  | (1.5)us-gaap_OperatingIncomeLoss / us-gaap_BusinessAcquisitionAxis = pkg_BoiseInc.Member / pkg_NonrecurringActivityAxis = pkg_NonrecurringAcquisitionRelatedCostsMember |  |  |  |  |  |  |  |  |  |
Decrease (Increase) in net income |  |  |  |  |  |  |  |  | 10.0 us-gaap_QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountAffectingComparability / us-gaap_BusinessAcquisitionAxis = pkg_BoiseInc.Member / pkg_NonrecurringActivityAxis = pkg_NonrecurringAcquisitionRelatedCostsMember |  | 1.0 us-gaap_QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountAffectingComparability / us-gaap_BusinessAcquisitionAxis = pkg_BoiseInc.Member / pkg_NonrecurringActivityAxis = pkg_NonrecurringAcquisitionRelatedCostsMember |  |  |  |  |  |  |  |  |  |
Decrease (Increase) in net income per diluted share |  |  |  |  |  |  |  |  | $ 0.10 pkg_QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountPerDilutedShareAffectingComparability / us-gaap_BusinessAcquisitionAxis = pkg_BoiseInc.Member / pkg_NonrecurringActivityAxis = pkg_NonrecurringAcquisitionRelatedCostsMember |  | $ 0.01 pkg_QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountPerDilutedShareAffectingComparability / us-gaap_BusinessAcquisitionAxis = pkg_BoiseInc.Member / pkg_NonrecurringActivityAxis = pkg_NonrecurringAcquisitionRelatedCostsMember |  |  |  |  |  |  |  |  |  |
Boise Inc. | Acquisition-Related Debt Financing Costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Quarterly Financial Data [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense, net |  |  |  |  |  |  |  |  | (8.9)us-gaap_InterestIncomeExpenseNonoperatingNet / us-gaap_BusinessAcquisitionAxis = pkg_BoiseInc.Member / pkg_NonrecurringActivityAxis = pkg_AcquisitionRelatedDebtFinancingCostsMember |  | (2.7)us-gaap_InterestIncomeExpenseNonoperatingNet / us-gaap_BusinessAcquisitionAxis = pkg_BoiseInc.Member / pkg_NonrecurringActivityAxis = pkg_AcquisitionRelatedDebtFinancingCostsMember |  |  |  |  |  |  |  |  |  |
Decrease (Increase) in net income |  |  |  |  |  |  |  |  | 5.6 us-gaap_QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountAffectingComparability / us-gaap_BusinessAcquisitionAxis = pkg_BoiseInc.Member / pkg_NonrecurringActivityAxis = pkg_AcquisitionRelatedDebtFinancingCostsMember |  | 1.8 us-gaap_QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountAffectingComparability / us-gaap_BusinessAcquisitionAxis = pkg_BoiseInc.Member / pkg_NonrecurringActivityAxis = pkg_AcquisitionRelatedDebtFinancingCostsMember |  |  |  |  |  |  |  |  |  |
Decrease (Increase) in net income per diluted share |  |  |  |  |  |  |  |  | $ 0.06 pkg_QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountPerDilutedShareAffectingComparability / us-gaap_BusinessAcquisitionAxis = pkg_BoiseInc.Member / pkg_NonrecurringActivityAxis = pkg_AcquisitionRelatedDebtFinancingCostsMember |  | $ 0.02 pkg_QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountPerDilutedShareAffectingComparability / us-gaap_BusinessAcquisitionAxis = pkg_BoiseInc.Member / pkg_NonrecurringActivityAxis = pkg_AcquisitionRelatedDebtFinancingCostsMember |  |  |  |  |  |  |  |  |  |
Boise Inc. | Acquisition Inventory Step-Up |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Quarterly Financial Data [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Income (Loss) |  |  |  |  |  |  |  |  | 21.5 us-gaap_OperatingIncomeLoss / us-gaap_BusinessAcquisitionAxis = pkg_BoiseInc.Member / pkg_NonrecurringActivityAxis = pkg_AcquisitionInventoryStepUpMember |  |  |  |  |  |  |  |  |  |  |  |
Decrease (Increase) in net income |  |  |  |  |  |  |  |  | $ 13.6 us-gaap_QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountAffectingComparability / us-gaap_BusinessAcquisitionAxis = pkg_BoiseInc.Member / pkg_NonrecurringActivityAxis = pkg_AcquisitionInventoryStepUpMember |  |  |  |  |  |  |  |  |  |  |  |
Decrease (Increase) in net income per diluted share |  |  |  |  |  |  |  |  | $ 0.14 pkg_QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountPerDilutedShareAffectingComparability / us-gaap_BusinessAcquisitionAxis = pkg_BoiseInc.Member / pkg_NonrecurringActivityAxis = pkg_AcquisitionInventoryStepUpMember |  |  |  |  |  |  |  |  |  |  |  |
[1] | Includes $18.0 million of DeRidder restructuring charges ($11.7 million after-tax or $0.12 per diluted share) and $6.4 million of integration-related and other costs ($4.2 million after-tax or $0.04 per diluted share).
[2] | Includes $26.0 million of DeRidder restructuring charges ($16.6 million after-tax or $0.17 per diluted share) and $4.5 million of integration-related and other costs ($2.9 million after-tax or $0.03 per diluted share).
[3] | Includes $17.8 million of DeRidder restructuring charges ($11.2 million after-tax or $0.12 per diluted share) and $4.9 million of integration-related and other costs ($3.0 million after-tax or $0.03 per diluted share).
[4] | Includes $17.6 million of costs accrued for the settlement of the Kleen Products LLC v Packaging Corp. of America et al class action lawsuit ($11.2 million after-tax or $0.11 per diluted share), $4.1 million of integration-related costs ($2.6 million after-tax or $0.03 per diluted share), and $4.0 million of DeRidder restructuring charges ($2.6 million after-tax or $0.02 per diluted share).
[5] | Includes Boise's results for the period of October 25, 2013, through December 31, 2013. The quarter also includes $166.0 million of income tax benefits from the reversal of the reserves for unrecognized tax benefits from alternative energy tax credits ($1.70 per diluted share), partially offset by $21.5 million of expense for the acquisition inventory step-up ($13.6 million after-tax or $0.14 per diluted share), $15.8 million of acquisition-related costs ($10.0 million after-tax or $0.10 per diluted share), $8.9 million of acquisition-related financing costs ($5.6 million after-tax or $0.06 per diluted share), and $17.4 million of integration-related and other costs ($11.0 million after-tax or $0.11 per diluted share).
[6] | Includes a $3.1 million non-cash pension curtailment charge ($2.0 million after-tax or $0.02 per diluted share), $1.5 million of acquisition-related costs ($1.0 million after-tax or $0.01 per diluted share), and $2.7 million of acquisition-related financing costs ($1.8 million after-tax or $0.02 per diluted share).
[7] | Includes a $7.8 million non-cash pension curtailment charge ($5.0 million after-tax or $0.05 per diluted share).
[8] | On October 25, 2013, we acquired Boise Inc. (Boise). Our financial results include Boise subsequent to acquisition.
[9] | Includes $1.5 million of expense related to the write-off of deferred financing costs in connection with the debt refinancing discussed in Note 10, Debt.
[10] | Includes $10.5 million of expenses for financing the acquisition and $1.1 million of expense for the write-off of deferred financing costs.
[11] | Includes $24.8 million of debt refinancing charges, including a $21.3 million redemption premium, a $3.4 million charge to settle the treasury lock prior to its maturity, and $0.1 million of other items.

X
- Definition Represents the high price of the Company's stock during the reporting period. + References No definition available. + Details
Name: | pkg_HighStockPricePerShare
Namespace Prefix: | pkg_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the low price of the Company's stock during the reporting period. + References No definition available. + Details
Name: | pkg_LowStockPricePerShare
Namespace Prefix: | pkg_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Per share amount of the item included in the interim period that affected period-to-period comparability (excluding restatement adjustments). + References No definition available. + Details
Name: | pkg_QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountPerDilutedShareAffectingComparability
Namespace Prefix: | pkg_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=32703322&loc=d3e4984-109258 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.19) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.23) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 18 -Article 7 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 20 -Article 5 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 21 -Article 9 + Details
Name: | us-gaap_EarningsPerShareBasic
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 18 -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 20 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 21 -Article 9 + Details
Name: | us-gaap_EarningsPerShareDiluted
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1,2) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
Name: | us-gaap_GrossProfit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 20 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35710027&loc=d3e41242-110953 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 10 -Article 5 + Details
Name: | us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: 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=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 3: 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 Reference 4: 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 + Details
Name: | us-gaap_IncomeTaxExpenseBenefit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The net amount of nonoperating interest income (expense). + References No definition available. + Details
Name: | us-gaap_InterestIncomeExpenseNonoperatingNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Other Comprehensive Income -URI http://asc.fasb.org/extlink&oid=6519514 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Net Income -URI http://asc.fasb.org/extlink&oid=6518256 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.19) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.18) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.22) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 19 -Article 5 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 20 -Article 9 + Details
Name: | us-gaap_NetIncomeLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The net result for the period of deducting operating expenses from operating revenues. + References No definition available. + Details
Name: | us-gaap_OperatingIncomeLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of the item included in the interim period that affected period-to-period comparability (excluding restatement adjustments). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35737889&loc=d3e1570-108306 + Details
Name: | us-gaap_QuarterlyFinancialInformationQuarterlyChargesAndCreditsAmountAffectingComparability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
Name: | us-gaap_SalesRevenueNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | pkg_NonrecurringActivityAxis=pkg_AlternativeFuelMixtureCreditsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pkg_NonrecurringActivityAxis=pkg_NonCashPensionCurtailmentChargeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pkg_NonrecurringActivityAxis=us-gaap_RestructuringChargesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pkg_NonrecurringActivityAxis=us-gaap_SettledLitigationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=pkg_BoiseInc.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |