XML 98 R58.htm IDEA: XBRL DOCUMENT v3.20.2
Derivative Financial Instruments, Investments and Fair Value Measurements - Investments (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]        
Dividend income $ 3 $ 0 $ 4 $ 0
Unrealized gain 18 0 48 0
Investment income from marketable securities $ 21 $ 0 $ 52 $ 0