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Subsequent Events (Details) - Subsequent Event shares in Millions, $ in Billions | Apr. 25, 2024 USD ($) employee shares | Apr. 02, 2024
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NFP |  |
Subsequent Event [Line Items] |  |
Number of colleagues (more than) | employee | 7,700 |
NFP | Senior Notes | 6.875% Senior Notes Due 2028 |  |
Subsequent Event [Line Items] |  |
Debt interest rate percentage |  | 6.875%
NFP | Senior Notes | 4.875% Senior Notes Due 2028 |  |
Subsequent Event [Line Items] |  |
Debt interest rate percentage |  | 4.875%
NFP | Senior Notes | 7.500% Senior Secured Notes Due 2030 |  |
Subsequent Event [Line Items] |  |
Debt interest rate percentage |  | 7.50%
NFP | Senior Notes | 8.500% Senior Secured Notes Due 2031 |  |
Subsequent Event [Line Items] |  |
Debt interest rate percentage |  | 8.50%
NFP |  |
Subsequent Event [Line Items] |  |
Total consideration | $ 9.1 |
Payments to acquire businesses, gross | $ 3.2 |
Number of shares issued for acquisition (up to) | shares | 19 |
Equity interest issued or issuable, value | $ 5.9 |

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