Debt Instrument Carrying Value

No definition available.

Name:	pkg_DebtInstrumentCarryingValue
Namespace Prefix:	pkg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Debt instrument redemption amount included premiums, accrued and unpaid interest.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Estimated interest payment next twelve months.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Estimated interest payments year five.

+ References

No definition available.

+ Details

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Namespace Prefix:	pkg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Estimated interest payments year four.

+ References

No definition available.

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Namespace Prefix:	pkg_
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Balance Type:	debit
Period Type:	duration

- Definition

Estimated interest payments year three.

+ References

No definition available.

+ Details

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Namespace Prefix:	pkg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Estimated interest payments year two.

+ References

No definition available.

+ Details

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Namespace Prefix:	pkg_
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Balance Type:	debit
Period Type:	duration

- Definition

Long term debt maturities repayments of principal in year five and thereafter.

+ References

No definition available.

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Amount of amortization expense attributable to debt issuance costs.

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Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

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- Definition

Increase for accrued, but unpaid interest on the debt instrument for the period.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format.

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Period Type:	duration

- Definition

Date the debt instrument was offered for sale, in YYYY-MM-DD format.

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Period Type:	duration

- Definition

Fair value amount of debt instrument that was repurchased.

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	instant

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

Amount, after accumulated amortization, of debt discount.

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Period Type:	instant

- Definition

Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date.

+ References

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- Definition

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

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- Definition

Amount of cash paid for interest, including, but not limited to, capitalized interest and payment to settle zero-coupon bond attributable to accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount; classified as operating and investing activities.

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Period Type:	duration

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

No definition available.

+ Details

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- Definition

Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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- Definition

Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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- Definition

Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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- Definition

Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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- Definition

The portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate.

+ References

No definition available.

+ Details

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- Definition

The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.

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The excess of the (1) fair value of consideration transferred to the holders of a security in excess of (2) the carrying amount of the security reported on the registrant's balance sheet, which will be deducted from net earnings to derive net earnings available to common shareholders. This amount is generally an adjustment considered in the computation of earnings per share.

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No definition available.

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Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

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Balance Type:
Period Type:

Debt - Additional Information (Details) - USD ($)							1 Months Ended		3 Months Ended	12 Months Ended
Debt - Additional Information (Details) - USD ($)	Oct. 08, 2021	Sep. 21, 2021	Nov. 21, 2019	Dec. 13, 2017	Sep. 05, 2014	Oct. 22, 2013	Sep. 30, 2021	Nov. 30, 2019	Dec. 31, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Oct. 31, 2021
Debt Instrument [Line Items]
Redeemed Value of Notes										$ 2,491,000,000.0	$ 2,493,700,000
Annual Principal Maturities for Debt [Abstract]
2022										0
2023										0
2024										400,000,000.0
2025										0
2026 and thereafter										2,100,000,000
Interest payments										149,600,000	97,000,000.0	$ 114,000,000.0
Estimated interest payments for 2022										84,700,000
Estimated interest payments for 2023										84,200,000
Estimated interest payments for 2024										84,200,000
Estimated interest payments for 2025										69,600,000
Estimated interest payments for 2026										1,000,000,000.0
Amortization of net (loss) gain on treasury lock												(18,200,000)
Amortization of financing costs										3,400,000	2,000,000.0	$ 4,500,000
Write-off of deferred debt issuance costs							$ 1,400,000	$ 1,800,000
Treasury Lock
Annual Principal Maturities for Debt [Abstract]
Amortization of net (loss) gain on treasury lock								$ (13,100,000)	$ (13,100,000)
Line of Credit
Debt Instrument [Line Items]
Redeemed Value of Notes										0	0
Unused borrowing capacity										323,200,000
Unsecured Revolving Credit Facility
Debt Instrument [Line Items]
Redeemed Value of Notes										$ 350,000,000
Debt instrument, term										5 years
Debt instrument, maturity date										Aug. 29, 2021
Debt instrument offering date										Jun. 08, 2021
3.00% Senior Notes, due December 2029
Debt Instrument [Line Items]
Stated interest rate									3.00%			3.00%
Debt Instrument aggregate principal amount												$ 900,000,000
Debt instrument, redemption amount included premiums, accrued and unpaid interest									$ 928,400,000			$ 928,400,000
3.00% Senior Notes, due December 2029 \| Senior Notes
Debt Instrument [Line Items]
Debt, face amount			$ 500,000,000.0
Redeemed Value of Notes										$ 499,500,000	$ 499,400,000
Stated interest rate			3.00%							3.00%	3.00%
Debt instrument, maturity date			Dec. 15, 2029							Dec. 15, 2029	Dec. 15, 2029
Annual Principal Maturities for Debt [Abstract]
Write-off unamortized debt discount										$ 500,000	$ 600,000
4.05% Senior Notes, due December 2049
Debt Instrument [Line Items]
Stated interest rate									4.05%			4.05%
Debt Instrument aggregate principal amount												$ 900,000,000
Debt instrument, redemption amount included premiums, accrued and unpaid interest									$ 928,400,000			$ 928,400,000
4.05% Senior Notes, due December 2049 \| Senior Notes
Debt Instrument [Line Items]
Debt, face amount			$ 400,000,000.0
Redeemed Value of Notes										$ 396,600,000	$ 396,600,000
Stated interest rate			4.05%							4.05%	4.05%
Debt instrument, maturity date			Dec. 15, 2049							Dec. 15, 2049	Dec. 15, 2049
Annual Principal Maturities for Debt [Abstract]
Write-off unamortized debt discount										$ 3,400,000	$ 3,400,000
3.90% Senior Notes, due June 2022
Debt Instrument [Line Items]
Stated interest rate									3.90%			3.90%
4.50% Senior Notes, due November 2023
Debt Instrument [Line Items]
Stated interest rate													4.50%
Debt instrument, redemption amount included premiums, accrued and unpaid interest													$ 769,800,000
4.50% Senior Notes, due November 2023 \| Senior Notes
Debt Instrument [Line Items]
Debt, face amount		$ 700,000,000.0				$ 700,000,000.0
Redeemed Value of Notes											$ 699,400,000
Stated interest rate	4.50%	4.50%				4.50%				4.50%	4.50%
Debt instrument, maturity date		Nov. 01, 2023				Nov. 01, 2023				Nov. 01, 2023	Nov. 01, 2023
Debt instrument, repurchase amount	$ 769,800,000
Debt instrument, redemption premium	56,100,000
Debt instrument, accrued and unpaid interest	13,700,000
Annual Principal Maturities for Debt [Abstract]
Write-off of deferred debt issuance costs	1,400,000
Write-off unamortized debt discount	$ 500,000										$ 600,000
3.65% Senior Notes, due September 2024 \| Senior Notes
Debt Instrument [Line Items]
Debt, face amount					$ 400,000,000.0
Redeemed Value of Notes										$ 399,600,000	$ 399,500,000
Stated interest rate					3.65%					3.65%	3.65%
Debt instrument, maturity date					Sep. 15, 2024					Sep. 15, 2024	Sep. 15, 2024
Annual Principal Maturities for Debt [Abstract]
Write-off unamortized debt discount										$ 400,000	$ 500,000
3.40% Senior Notes, due December 2027 \| Senior Notes
Debt Instrument [Line Items]
Debt, face amount				$ 500,000,000.0
Redeemed Value of Notes										$ 499,000,000.0	$ 498,800,000
Stated interest rate				3.40%						3.40%	3.40%
Debt instrument, maturity date				Dec. 15, 2027						Dec. 15, 2027	Dec. 15, 2027
Annual Principal Maturities for Debt [Abstract]
Write-off unamortized debt discount										$ 1,000,000.0	$ 1,200,000
Fixed-Rate Senior Notes \| Senior Notes
Debt Instrument [Line Items]
Book value of fixed rate debt										2,491,000,000.0
Long-term debt (fixed-rate debt), fair value										$ 2,650,100,000
3.05% Senior Notes, due December 2051 \| Senior Notes
Debt Instrument [Line Items]
Debt, face amount		$ 700,000,000.0
Stated interest rate		3.05%								3.05%
Debt instrument, maturity date		Dec. 31, 2051
Debt issuance costs										$ 7,700,000
3.05% Senior Notes, due October 2021
Debt Instrument [Line Items]
Stated interest rate													3.05%
3.05% Senior Notes, due October 2021 \| Senior Notes
Debt Instrument [Line Items]
Debt, face amount		$ 700,000,000.0
Stated interest rate		3.05%
Debt instrument, maturity date		Oct. 01, 2051
Redemption Premiums
Annual Principal Maturities for Debt [Abstract]
Interest payments										$ 56,100,000		$ 22,200,000