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Borrowings - Revolving Credit Facility (Details) - Line of Credit € in Millions, £ in Millions, $ in Millions | Jun. 28, 2022 USD ($) | Mar. 31, 2023 USD ($) | Mar. 31, 2023 CAD ($) | Mar. 31, 2023 EUR (€) | Mar. 31, 2023 GBP (£) | Dec. 31, 2022 USD ($) | Dec. 31, 2022 CAD ($) | Dec. 31, 2022 EUR (€) | Dec. 31, 2022 GBP (£)
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Revolving Credit Facility |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Asset coverage ratio | 1.50 |  |  |  |  |  |  |  |
Revolving Credit Facility | Revolving Credit Facility |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  | $ 1,625,000,000 | $ 274.9 | € 97.9 | £ 65.4 | $ 1,625,000,000 | $ 355.9 | € 97.9 | £ 66.6
Unused capacity, commitment fee percentage | 0.375% |  |  |  |  |  |  |  |
Revolving Credit Facility | Scenario 1 | Revolving Credit Facility |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 0.75% |  |  |  |  |  |  |  |
Combined revolving debt amount multiplier | 1.6 |  |  |  |  |  |  |  |
Revolving Credit Facility | Scenario 2 | Revolving Credit Facility |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 0.875% |  |  |  |  |  |  |  |
Combined revolving debt amount multiplier | 1.6 |  |  |  |  |  |  |  |
Revolving Credit Facility | Scenario 3 | Revolving Credit Facility |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 1.75% |  |  |  |  |  |  |  |
Combined revolving debt amount multiplier | 1.6 |  |  |  |  |  |  |  |
Revolving Credit Facility | Scenario 4 | Revolving Credit Facility |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 1.875% |  |  |  |  |  |  |  |
Combined revolving debt amount multiplier | 1.6 |  |  |  |  |  |  |  |
Revolving Credit Facility | SOFR | Revolving Credit Facility |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 1.00% |  |  |  |  |  |  |  |
Revolving Credit Facility | Base Rate | Revolving Credit Facility |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 0.50% |  |  |  |  |  |  |  |
Letter of Credit | Revolving Credit Facility |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity | $ 175,000,000 |  |  |  |  |  |  |  |

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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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