XML 14 R38.htm IDEA: XBRL DOCUMENT v3.20.1
Income Taxes (Provision) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Income Taxes    
Effective tax rate 1.10% 4.50%
Various discrete tax items expense (benefit) $ (20) $ (25)
Annual effective tax rate excluding discrete items (as a percent) (9.50%) (10.60%)