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Debt (Details Textual) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Debt Instrument [Line Items] |  |  |
Line of credit maximum capacity | $ 4,000.0 | $ 4,000.0 |
Fees to maintain credit lines | 14.2 | 20.2 |
Interest paid | $ 8,200.0 | 6,400.0 | $ 2,200.0
Minimum |  |  |
Debt Instrument [Line Items] |  |  |
Common equity tier one ratio | 4.5 |  |
Maximum |  |  |
Debt Instrument [Line Items] |  |  |
Common equity tier one ratio | 6.5 |  |
Short-term Debt |  |  |
Debt Instrument [Line Items] |  |  |
Fees to maintain credit lines | $ 11.9 | 12.0 |
Lending Trust |  |  |
Debt Instrument [Line Items] |  |  |
Debt term | 3 years |  |
Line of credit maximum capacity | $ 3,000.0 |  |
Subsidiaries |  |  |
Debt Instrument [Line Items] |  |  |
Line of credit maximum capacity | 191.0 | 185.0 |
Amount drawn from committed lines | 16.0 | 0.0 |
Charge Trust |  |  |
Debt Instrument [Line Items] |  |  |
Line of credit maximum capacity | $ 3,000.0 |  |
Debt instrument, term | 3 years |  |
Specified date face amount of eligible notes issued | Jul. 15, 2026 |  |
Amount drawn from committed lines | $ 0.0 | $ 0.0 |

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