XML 108 R61.htm IDEA: XBRL DOCUMENT v3.20.1
Financial Instruments (Details 3) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Investments, Debt and Equity Securities [Abstract]    
Proceeds from maturities and sales $ 2,389.3 $ 1,489.2
Realized gains 5.7 0.6
Realized losses $ (19.1) $ (0.3)