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Income Taxes - Deferred Tax Assets and Liabilities on Balance Sheets (Details) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Income Tax Disclosure [Abstract] |  |
Noncurrent assets | $ 112 | $ 20
Noncurrent liabilities | (4,247) | (745)
Total | $ (4,135) | $ (725)

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