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Debt (Narrative) (Details) € in Millions, £ in Millions, $ in Millions | Apr. 02, 2021 USD ($) loan | Apr. 02, 2021 EUR (€) loan | Apr. 02, 2021 GBP (£) loan
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Revolving Credit Facility, due May 2023 | 2018 Credit Facility | Unsecured Debt |  |  |
Debt Instrument [Line Items] |  |  |
Current borrowing capacity | $ | $ 1,250.0 |  |
Additional Loan Facility | 2018 Credit Facility | Unsecured Debt |  |  |
Debt Instrument [Line Items] |  |  |
Current borrowing capacity | $ | 500.0 |  |
Uncommitted Revolving Credit Facilities $75 million |  |  |
Debt Instrument [Line Items] |  |  |
Current borrowing capacity | $ | $ 75.0 |  |
Number of revolving loan facilities | loan | 2 | 2 | 2
Uncommitted Revolving Credit Facilities 100 million euros |  |  |
Debt Instrument [Line Items] |  |  |
Current borrowing capacity | € |  | € 100.0 |
Number of revolving loan facilities | loan | 1 | 1 | 1
Uncommitted Revolving Credit Facilities 55 million GBP |  |  |
Debt Instrument [Line Items] |  |  |
Current borrowing capacity | £ |  |  | £ 55.0
Number of revolving loan facilities | loan | 1 | 1 | 1

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