Investments - Other than Temporary Impairment, Credit Losses Recognized in Earnings (Details) - USD ($) $ in Millions |
12 Months Ended | |
---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
|
Debt Securities, Available-for-sale [Line Items] | ||
Total other-than-temporary impairments | $ 2.4 | $ 1.7 |
Net realized and unrealized gains on investments | ||
Debt Securities, Available-for-sale [Line Items] | ||
Total other-than-temporary impairments | 2.1 | 1.5 |
Other income (expenses), net | ||
Debt Securities, Available-for-sale [Line Items] | ||
Total other-than-temporary impairments | $ 0.3 | $ 0.2 |