Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Details)

v3.19.1
Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Income Tax Disclosure [Abstract]    
Income Tax Expense $ 3 $ 15
U.S. corporate income tax rate 21.00% 21.00%