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Investments Accounted for Using the Equity Method and Variable Interest Entities, or VIEs - Summarized Financial Information (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Schedule of Equity Method Investments [Line Items] |  |
Accounts receivable, net | $ 904 | $ 1,025
Other non-current assets | 216 | 240
Total Assets | 14,902 | 12,531
Current liabilities | 1,915 | 2,359
Long-term debt | 8,855 | 6,042
Other non-current liabilities | 1,066 | 1,084
Total Liabilities | 13,222 | 10,853
Variable Interest Entity, Primary Beneficiary |  |
Schedule of Equity Method Investments [Line Items] |  |
Accounts receivable, net | 647 | 3
Other current assets | 2 | 0
Net property, plant and equipment | 0 | 71
Other non-current assets | 0 | 27
Total Assets | 649 | 101
Current liabilities | 78 | 4
Long-term debt | 0 | 24
Other non-current liabilities | 0 | 8
Total Liabilities | 78 | 36
Redeemable noncontrolling interests | 0 | 20
Net assets less noncontrolling interests | $ 571 | $ 45

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