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Debt - Narrative (Details) |  |  |  |  |  |  |  | 1 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 30, 2023 USD ($) | Sep. 29, 2023 | Jul. 01, 2023 | Jul. 05, 2022 USD ($) | Mar. 28, 2022 USD ($) | Feb. 10, 2021 USD ($) | Sep. 25, 2018 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Jun. 30, 2022 | May 30, 2022 USD ($) | May 06, 2022 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of debt | $ 641,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capitalized deferred debt issuance costs |  |  |  |  |  |  |  | $ 1,500,000 |  | $ 1,500,000 |  |  |  |  |
Debt issuance costs and discounts |  |  |  |  |  |  |  | 24,300,000 | $ 29,400,000 | 24,300,000 | $ 29,400,000 |  |  |  |
Amortization of deferred issuance costs |  |  |  |  |  |  |  |  |  | 7,600,000 | 6,400,000 | $ 4,000,000.0 |  |  |
Interest expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization of deferred issuance costs |  |  |  |  |  |  |  |  |  | 6,500,000 | 5,500,000 |  |  |  |
Unsecured notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair market value of notes |  |  |  |  |  |  |  | $ 335,600,000 | $ 308,400,000 | $ 335,600,000 | $ 308,400,000 |  |  |  |
Line of Credit | Revolving facility - U.S. dollar borrowings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facility term |  |  |  | 1 month |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (percent) |  |  |  | 1.00% |  |  |  |  |  |  |  |  |  |  |
Line of Credit | Revolving facility - U.S. dollar borrowings | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (percent) |  |  |  | 1.00% |  |  |  |  |  |  |  |  |  |  |
Line of Credit | Revolving facility - U.S. dollar borrowings | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (percent) |  |  |  | 2.50% |  |  |  |  |  |  |  |  |  |  |
Line of Credit | Revolving facility - U.S. dollar borrowings | Fed Funds Effective Rate Overnight Index Swap Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (percent) |  |  |  | 0.50% |  |  |  |  |  |  |  |  |  |  |
Line of Credit | Revolving facility - U.S. dollar borrowings | Base Rate | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (percent) |  |  |  | 0.00% |  |  |  |  |  |  |  |  |  |  |
Line of Credit | Revolving facility - U.S. dollar borrowings | Base Rate | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (percent) |  |  |  | 1.50% |  |  |  |  |  |  |  |  |  |  |
Credit Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Effective interest rate on debt facilities (percent) |  |  |  |  |  |  |  |  |  | 5.98% | 5.11% |  |  |  |
Credit Agreement | Line of Credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowings under credit facility |  |  |  |  |  |  | $ 700,000,000 |  |  |  |  |  |  |  |
Maximum net debt to EBITDA ratio |  | 4.75 |  |  |  |  |  |  |  |  |  |  |  |  |
EBITDA ratio |  |  |  |  |  |  |  | 4.50 | 4.50 | 4.50 | 4.50 |  |  |  |
Interest coverage ratio |  |  |  |  |  |  |  |  | 3.00 |  | 3.00 |  |  |  |
Credit Agreement | Line of Credit | Triggering Event One |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum net debt to EBITDA ratio |  | 4.75 |  |  |  |  |  |  |  |  |  |  |  |  |
Credit Agreement | Line of Credit | Triggering Event Three |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum net debt to EBITDA ratio |  | 4.50 |  |  |  |  |  |  |  |  |  |  |  |  |
Credit Agreement | Line of Credit | Triggering Event Two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum net debt to EBITDA ratio |  | 4.50 |  |  |  |  |  |  |  |  |  |  |  |  |
Credit Agreement | Line of Credit | Revolving facility - U.S. dollar borrowings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowings under credit facility |  |  |  |  |  |  | $ 500,000,000 |  |  |  |  |  |  |  | $ 600,000,000
Credit facility term |  |  |  |  |  |  | 5 years |  |  |  |  |  |  |  |
Credit Agreement | Revolving facility - U.S. dollar borrowings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowings under credit facility |  |  |  |  |  |  | $ 400,000,000 |  |  |  |  |  |  |  |
Term loan A facility | Term Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Average interest rate (percent) |  |  |  |  |  |  |  | 8.20% |  | 8.20% |  |  |  |  |
Term loan A facility | Line of Credit | Term Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facility term |  |  |  |  |  |  | 7 years |  |  |  |  |  |  |  |
Face amount |  |  |  |  |  |  | $ 200,000,000 |  |  |  |  |  |  |  |
Term loan A facility | Line of Credit | Term Loan | Fed Funds Effective Rate Overnight Index Swap Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (percent) |  |  |  | 0.50% |  |  |  |  |  |  |  |  |  |  |
Term loan A facility | Line of Credit | Term Loan | Secured Overnight Financing Rate (SOFR) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (percent) |  |  |  | 1.00% |  |  |  |  |  |  |  |  |  |  |
Term loan A facility | Line of Credit | Term Loan | Secured Overnight Financing Rate (SOFR) | Expected | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (percent) |  |  |  | 1.25% |  |  |  |  |  |  |  |  |  |  |
Term loan A facility | Line of Credit | Term Loan | Secured Overnight Financing Rate (SOFR) | Expected | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (percent) |  |  |  | 2.75% |  |  |  |  |  |  |  |  |  |  |
Term loan A facility | Line of Credit | Term Loan | Base Rate | Expected | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (percent) |  |  |  | 0.25% |  |  |  |  |  |  |  |  |  |  |
Term loan A facility | Line of Credit | Term Loan | Base Rate | Expected | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (percent) |  |  |  | 1.75% |  |  |  |  |  |  |  |  |  |  |
Term loan B facility | Term Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Average interest rate (percent) |  |  |  |  |  |  |  | 9.21% |  | 9.21% |  |  |  |  |
Term loan B facility | Line of Credit | Term Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facility term |  |  |  |  |  | 7 years |  |  |  |  |  |  |  |  |
Face amount |  |  |  |  |  | $ 350,000,000 |  |  |  |  |  |  |  |  |
Incremental loans |  |  |  |  |  | $ 250,000,000 |  |  |  |  |  |  |  |  |
Repayments of debt |  |  |  | $ 445,900,000 |  |  |  |  |  |  |  |  |  |  |
Term loan B facility | Line of Credit | Term Loan | Secured Overnight Financing Rate (SOFR) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (percent) |  |  | 2.75% |  |  |  |  |  |  |  |  |  |  |  |
Term loan B facility | Line of Credit | Term Loan | Secured Overnight Financing Rate (SOFR) Floor |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (percent) |  |  | 0.75% |  |  |  |  |  |  |  |  |  |  |  |
Term loan B facility | Line of Credit | Term Loan | Euro Interbank Offered Rate (EURIBOR) Floor |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (percent) |  |  | 0.00% |  |  |  |  |  |  |  |  |  |  |  |
Term loan B facility | Line of Credit | Term Loan | Euro Interbank Offered Rate (EURIBOR) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate (percent) |  |  | 3.75% |  |  |  |  |  |  |  |  |  |  |  |
Delayed draw term loan | Term Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Average interest rate (percent) |  |  |  |  |  |  |  | 7.95% |  | 7.95% |  |  |  |  |
Delayed draw term loan | Line of Credit | Term Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowings under credit facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 650,000,000
Proceeds from lines of credit |  |  |  | 650,000,000 |  |  |  |  |  |  |  |  |  |  |
Neenah, Inc. Global Secured Revolving Credit Facility | Line of Credit | Revolving facility - U.S. dollar borrowings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of lines of credit |  |  |  | 59,000,000 |  |  |  |  |  |  |  |  |  |  |
Revolving facility - U.S. dollar borrowings | Line of Credit | Revolving facility - U.S. dollar borrowings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayments of long-term lines of credit |  |  |  | $ 100,000,000 |  |  |  | $ 641,200,000 | $ 127,000,000 |  |  |  |  |  |
Senior 364-Day Unsecured Bridge Facility | Bridge Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facility term |  |  |  |  | 364 days |  |  |  |  |  |  |  |  |  |
German loan agreement |  |  |  |  | $ 648,000,000 |  |  |  |  |  |  |  |  |  |
Senior 364-Day Unsecured Bridge Facility | Line of Credit | Revolving facility - U.S. dollar borrowings | Bridge Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
German loan agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50,000,000
Senior Secured Revolving Credit Facility | Line of Credit | Revolving facility - U.S. dollar borrowings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowings under credit facility |  |  |  |  | $ 500,000,000 |  |  |  |  |  |  |  |  |  | $ 0
6.875% senior unsecured notes due October 1, 2026 | Corporate Bond Securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (percent) |  |  |  |  |  |  |  | 6.875% |  | 6.875% |  |  |  |  |
6.875% senior unsecured notes due October 1, 2026 | Unsecured notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Face amount |  |  |  |  |  |  | $ 350,000,000 |  |  |  |  |  |  |  |
Interest rate (percent) |  |  |  |  |  |  | 6.875% | 6.875% |  | 6.875% |  |  | 6.875% |  |
Interest rate at period end (percent) |  |  |  |  |  |  |  | 7.248% |  | 7.248% |  |  |  |  |
Revolving credit agreement | Revolving facility - U.S. dollar borrowings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Average interest rate (percent) |  |  |  |  |  |  |  | 8.04% |  | 8.04% |  |  |  |  |
German loan agreement | German loan agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Face amount |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 10,700,000 |
Average interest rate (percent) |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.75% |

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