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Investments - Dun And Bradstreet (Details) - USD ($) |  | 1 Months Ended
--- | --- | ---
Feb. 08, 2019 | Apr. 30, 2019
Dun And Bradstreet Corporation | Dun And Bradstreet Corporation |  |
Business Acquisition [Line Items] |  |
Additional amount syndicated of Dun & Bradstreet Investment |  | $ 2,600,000
Ownership (as a percent) |  | 24.30%
Dun And Bradstreet Corporation |  |
Business Acquisition [Line Items] |  |
Common equity financed from Consortium and Black Knight, Inc. | $ 2,100,000,000 |
Financed by preferred equity from preferred equity sources | 1,100,000,000 |
Debt financing from various lenders | 4,000,000,000.0 |
Dun And Bradstreet Corporation | Cannae | Commitment To Purchase Common Equity of Dun And Bradstreet |  |
Business Acquisition [Line Items] |  |
Commitment to purchase | $ 900,000,000.0 |
Percentage of outstanding common equity | 24.50% |
Syndication fee income | $ 9,100,000 |
Dun And Bradstreet Corporation | Cannae | Equity Commitment to Purchase, Retained And Funded |  |
Business Acquisition [Line Items] |  |
Commitment to purchase | $ 505,600,000 |

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