Financial and Derivative Instruments (Details 3) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Offsetting Assets [Abstract]
Derivative Assets, Gross Amount Recognized	$ 6,259	$ 656
Derivative Assets, Gross Amounts Offset	5,757	645
Derivative Assets, Net Amounts Presented	502	11
Derivative Assets, Gross Amounts Not Offset	0	0
Derivative Assets, Net Amounts Presented	502	11
Offsetting Liabilities [Abstract]
Derivative Liabilities, Gross Amount Recognized	5,789	719
Derivative Liabilities, Gross Amounts Offset	5,757	645
Derivative Liabilities, Net Amounts Presented	32	74
Derivative Liabilities, Gross Amounts Not Offset	0	0
Derivative Liabilities, Net Amounts Presented	$ 32	$ 74