Investments, Loans and Long-Term Receivables - Chevron Phillips Chemical Company LLC (CPChem) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Schedule of Equity Method Investments [Line Items]
Equity investments	$ 12,832	$ 13,037
Chevron Phillips Chemical Company LLC
Schedule of Equity Method Investments [Line Items]
Percentage of ownership interest	50.00%
Equity investments	$ 6,369	$ 6,126

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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