Investments Accounted for Using the Equity Method and Variable Interest Entities, or VIEs (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Investments Accounted for by the Equity Method
Equity investments in affiliates	$ 350	$ 388
Current assets	3,479	3,088
Property, plant and equipment, net	2,573	2,593
Other non-current assets	225	240
Total Assets	12,822	12,531
Current liabilities	2,852	2,359
Long-term debt	6,592	6,042
Other non-current liabilities	1,076	1,084
Total Liabilities	11,286	10,853
Variable Interest Entity, Primary Beneficiary
Investments Accounted for by the Equity Method
Current assets	1	3
Property, plant and equipment, net	0	71
Other non-current assets	26	27
Total Assets	27	101
Current liabilities	4	4
Long-term debt	24	24
Other non-current liabilities	4	8
Total Liabilities	32	36
Redeemable noncontrolling interest	0	20
Net Assets Less Noncontrolling Interest	(5)	$ 45
Agua Caliente
Investments Accounted for by the Equity Method
Equity investments in affiliates	213
Ivampah Master Holdings LLC
Investments Accounted for by the Equity Method
Equity investments in affiliates	$ 6
Economic interest in equity method investments (as a percent)	54.50%