Fair Value Measurements (Details1) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Derivatives	$ 502	$ 11
Derivatives	32	74
Recurring Basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Marketable Securities	50	63
Derivatives	502	11
Total Assets at Fair Value	552	74
Derivatives	32	74
Total Liabilities at Fair Value	32	74
Recurring Basis | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Marketable Securities	50	63
Derivatives	366	1
Total Assets at Fair Value	416	64
Derivatives	12	26
Total Liabilities at Fair Value	12	26
Recurring Basis | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Marketable Securities	0	0
Derivatives	136	10
Total Assets at Fair Value	136	10
Derivatives	20	48
Total Liabilities at Fair Value	20	48
Recurring Basis | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Marketable Securities	0	0
Derivatives	0	0
Total Assets at Fair Value	0	0
Derivatives	0	0
Total Liabilities at Fair Value	$ 0	$ 0