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Long-term Debt and Short-term Borrowings (Narrative) (Details) € in Millions, $ in Millions |  |  |  |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2023 | May 23, 2019 USD ($) | Dec. 31, 2018 USD ($) | Jul. 26, 2018 USD ($) | Jan. 27, 2017 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | May 22, 2019 USD ($) | Jan. 27, 2017 EUR (€) | Jan. 27, 2017 AUD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Payments of Debt Issuance Costs |  |  |  |  |  | $ 3,400,000 | $ 600,000 | $ 3,600,000 |  |  |
Total debt |  |  | $ 888,000,000.0 |  |  | 816,000,000.0 | 888,000,000.0 |  |  |  |
Proceeds from (Repayments of) Debt |  |  |  |  |  | (70,600,000) |  |  |  |  |
Proceeds from long-term borrowings |  |  |  |  |  | 325,800,000 | 225,300,000 | $ 484,100,000 |  |  |
Senior Secured Credit Facility Due January 2022 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Credit agreement, term |  |  |  |  | 5 years |  |  |  |  |  |
Senior Secured Credit Facility Due May 2024 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Credit agreement, term |  | 5 years |  |  |  |  |  |  |  |  |
Senior Secured Notes | Euro Term Loan A |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Credit agreement, face amount |  |  |  |  | $ 320,800,000 |  |  |  |  | € 300.0 |
Senior Secured Notes | AUD Term Loan A |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Max borrowing capacity |  |  |  |  | 60,400,000 |  |  |  |  |  | $ 80.0
Senior Secured Notes | USD Senior Secured Term Loan A, due May 2024 (floating interest rate of 3.44% at December 31, 2019) |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total debt |  | $ 100,000,000.0 | 0 |  |  | 97,500,000 | 0 |  |  |  |
Senior Secured Notes | Senior Secured Credit Facility Due May 2024 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Payments of Debt Issuance Costs |  |  |  |  |  | 3,300,000 |  |  |  |  |
Senior Notes | Senior Unsecured Notes, due December 2024 (fixed interest rate of 5.25%) |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total debt |  |  | $ 375,000,000.0 |  |  | $ 375,000,000.0 | $ 375,000,000.0 |  |  |  |
Stated percentage |  |  | 5.25% |  |  | 5.25% | 5.25% |  |  |  |
Senior Secured Credit Facility Due January 2022 | Senior Secured Notes |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Minimum Leverage Ratio for Payments of Dividends or Repurchase of Shares |  |  |  |  |  |  |  |  | 2.50 |  |
Revolving Facility | Senior Secured Notes |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Max borrowing capacity |  |  |  |  | 400,000,000.0 |  |  |  |  |  |
Revolving Facility | Senior Secured Notes | Senior Secured Credit Facility Due January 2022 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Max borrowing capacity |  |  |  | $ 500,000,000.0 |  |  |  |  | $ 500,000,000.0 |  |
Line of Credit Facility, Increase (Decrease), Net |  |  |  | $ 100,000,000.0 |  |  |  |  |  |  |
Revolving Facility | Senior Secured Notes | Senior Secured Credit Facility Due May 2024 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Max borrowing capacity |  | 600,000,000.0 |  |  |  |  |  |  |  |  |
Line of Credit Facility, Increase (Decrease), Net |  | $ 200,000,000.0 |  |  |  |  |  |  |  |  |
Commitment fee percent |  |  |  |  |  | 0.25% |  |  |  |  |
Total debt |  |  |  |  |  | $ 22,200,000 |  |  |  |  |
Amount available for borrowings under the Restated Revolver Facility |  |  |  |  |  | 566,600,000 |  |  |  |  |
Letters of credit outstanding, amount |  |  |  |  |  | 11,200,000 |  |  |  |  |
Senior Secured Credit Facility Due May 2024 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Increase (Decrease) |  | (0.25%) |  |  |  |  |  |  |  |  |
Senior Secured Credit Facility Due May 2024 | Senior Secured Notes |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Proceeds from sales or dispositions of property or assets |  |  |  |  |  | $ 12,000,000.0 |  |  |  |  |
Proceeds from sales or dispositions of property or assets, percentage |  |  |  |  |  | 100.00% |  |  |  |  |
Dividends and/or purchase shares, threshold |  |  |  |  |  | $ 30,000,000.0 |  |  |  |  |
Dividends and/or purchase shares, threshold, percent of total assets |  |  |  |  |  | 1.00% |  |  |  |  |
Minimum leverage ratio for payment of dividends or repurchase of shares |  |  |  |  |  | 3.25 |  |  |  |  |
Maximum leverage ratio for payment of dividends or repurchase of shares |  |  |  |  |  | 3.75 |  |  |  |  |
Leverage ratio |  |  |  |  |  | 2.6 |  |  |  |  |
Leverage ratio, potential increase |  |  |  |  |  | 0.50 |  |  |  |  |
Maximum borrowing capacity, potential increase |  |  |  |  | $ 500,000,000.0 |  |  |  |  |  |
Interest Coverage Ratio |  |  |  |  |  | 7.5 |  |  |  |  |
Debt Instrument, Minimum Leverage Ratio for Payments of Dividends or Repurchase of Shares |  | 3.25 |  |  |  |  |  |  |  |  |
Senior Secured Credit Facility Due May 2024 | Senior Secured Notes | AUD Term Loan A |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Proceeds from sales or dispositions of property or assets, percentage |  |  |  |  |  | 100.00% |  |  |  |  |
Senior Secured Credit Facility Due May 2024 | Senior Secured Notes | Senior Secured Credit Facility Due May 2024 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Minimum Leverage Ratio for Payments of Dividends or Repurchase of Shares |  | 3.25 |  |  |  |  |  |  |  |  |
Minimum | Senior Secured Notes | Senior Secured Credit Facility Due May 2024 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Quarterly principal payment, based on annual percentage |  | 1.25% |  |  |  |  |  |  |  |  |
Minimum | Senior Secured Credit Facility Due January 2022 | Senior Secured Notes |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Consolidated Fixed Charge Coverage Ratio |  |  |  |  |  |  |  |  | 1.25 |  |
Minimum | Revolving Facility | Senior Secured Notes | Senior Secured Credit Facility Due May 2024 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Commitment fee percent |  |  |  |  |  | 0.20% |  |  |  |  |
Minimum | Senior Secured Credit Facility Due May 2024 | Senior Secured Notes |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Interest Coverage Ratio |  | 3.00 |  |  |  |  |  |  |  |  |
Maximum | Revolving Facility | Senior Secured Notes | Senior Secured Credit Facility Due May 2024 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Commitment fee percent |  |  |  |  |  | 0.35% |  |  |  |  |
Maximum | Senior Secured Credit Facility Due May 2024 | Senior Secured Notes |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Dividends and/or purchase shares, threshold |  |  |  |  |  | $ 75,000,000.0 |  |  |  |  |
Leverage ratio |  |  |  |  |  | 3.75 |  |  |  |  |
Euro/AUD/CDN | Senior Secured Credit Facility Due May 2024 | Senior Secured Notes |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  | 1.50% |  |  |  |  |  |  |  |
Euro/AUD/CDN | Minimum | Senior Secured Credit Facility Due May 2024 | Senior Secured Notes |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Base rate percent |  |  |  |  |  | 0.00% |  |  |  |  |
Applicable Rate on Base Rate Loans | Senior Secured Credit Facility Due May 2024 | Senior Secured Notes |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  | 0.50% |  |  |  |  |  |  |  |
Forecast | Maximum | Senior Secured Notes | Senior Secured Credit Facility Due May 2024 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Quarterly principal payment, based on annual percentage | 2.50% |  |  |  |  |  |  |  |  |  |

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Name: | srt_StatementScenarioAxis=srt_ScenarioForecastMember
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