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Commitments and Contingencies | 12 Months Ended
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Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract] |
Commitments and Contingencies | Commitments and Contingencies (a) We purchase annuities from life insurance companies to fulfill obligations under claim settlements that provide for periodic future payments to claimants. As of December 31, 2020, we had purchased such annuities with a present value of $29.1 million for settlement of claims on a structured basis for which we are contingently liable. To our knowledge, there are no material defaults from any of the issuers of such annuities. (b) As of December 31, 2020, we have made commitments that may require us to invest additional amounts into our investment portfolio, which are as follows:
($ in millions) |  | Amount of Obligation |  | Year of Expiration of Obligation
Alternative and other investments |  | $ | 215.7 |  |  | 2036
Non-publicly traded collateralized loan obligations in our fixed income securities portfolio |  | 37.7 |  |  | 2030
Non-publicly traded common stock within our equity portfolio |  | 2.0 |  |  | 2021
Commercial mortgage loans |  | 4.4 |  |  | Less than 1 year
Total |  | $ | 259.8 |  |  |
There is no certainty that any such additional investment will be required. We expect to have the capacity to repay or refinance these obligations as they come due.

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