XML 72 R66.htm IDEA: XBRL DOCUMENT v3.20.1
Fair Value (Available-For-Sale Securities) (Details) - USD ($)
$ in Millions
Mar. 31, 2020
Dec. 31, 2019
Fair Value Disclosure [Line Items]    
Debt Securities, Available-for-sale, Unrealized Loss Position $ 0.0 $ 17.2
Amortized Cost 148.4 150.1
Gross Unrealized Gains 2.9 4.3
Gross Unrealized Losses (5.5) [1] (0.2) [2]
Allowance for Credit Loss (1.2) 0.0
Fair Value 144.6 154.2
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value 54.0 12.2
U.S. Treasury debt securities    
Fair Value Disclosure [Line Items]    
Amortized Cost 26.7 31.4
Gross Unrealized Gains 0.7 0.1
Gross Unrealized Losses 0.0 [1] (0.1) [2]
Fair Value 27.4 31.4
Corporate/Other debt securities    
Fair Value Disclosure [Line Items]    
Amortized Cost 121.7 118.7
Gross Unrealized Gains 2.2 4.2
Gross Unrealized Losses (5.5) [1] (0.1) [2]
Fair Value $ 117.2 $ 122.8
[1]
(1)Fair value of U.S. Treasury debt securities and Corporate/Other debt securities in an unrealized loss position without an allowance for credit losses is $0 and $54 million, respectively, at March 31, 2020.
[2]
(2)Fair value of U.S. Treasury debt securities and Corporate/Other debt securities in an unrealized loss position without an allowance for credit losses is $17.2 million and $12.2 million, respectively, at December 31, 2019.