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Acquisition and Disposition - Amortization expense (Details) - National General Holdings Corp. $ in Millions | Jan. 04, 2021 USD ($)
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Business Acquisition [Line Items] |
2022 | $ 218
2023 | 185
2024 | 135
2025 | 103
2026 | 70
Thereafter | 140
Total amortization | $ 851

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