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Derivative and Financial Instruments (Tables) | 9 Months Ended
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Sep. 30, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Schedule of Balance Sheet Location and Fair Value Amounts of Derivatives | The following table presents the gross fair values of our commodity derivatives, excluding collateral, and the line items where they appear on our consolidated balance sheet:
| Millions of Dollars
| September 30 2022 | December 31 2021
Assets |  |
Prepaid expenses and other current assets | $ | 1,675 |  | 1,168 |
Other assets | 267 |  | 75 |
Liabilities |  |
Other accruals | 1,668 |  | 1,160 |
Other liabilities and deferred credits | 220 |  | 63 |
Schedule of Income Statement Location and Gain (Loss) Amounts of Derivatives | The gains (losses) from commodity derivatives incurred and the line items where they appear on our consolidated income statement were:
| Millions of Dollars
| Three Months Ended September 30 | Nine Months Ended September 30
| 2022 | 2021 | 2022 | 2021
Sales and other operating revenues | $ | (129) |  | (483) |  | (549) |  | (862) |
Other income | (4) |  | 7 |  | (2) |  | 23 |
Purchased commodities | 6 |  | 405 |  | 352 |  | 550 |
Schedule of Net Exposures from Outstanding Commodity Derivative Contracts | The table below summarizes our net exposures resulting from outstanding commodity derivative contracts:
| Open Position Long (Short)
| September 30 2022 | December 31 2021
Commodity |  |
Natural gas and power (billions of cubic feet equivalent) |  |
Fixed price | (18) |  | 4 |
Basis | (2) |  | (22) |
Schedule of Net Carrying Amount of Held to Maturity Investments | The following investments are carried on our consolidated balance sheet at cost, plus accrued interest, and the table reflects remaining maturities at September 30, 2022, and December 31, 2021:
| Millions of Dollars
| Carrying Amount
| Cash and Cash Equivalents | Short-Term Investments |
| September 30 2022 | December 31 2021 | September 30 2022 | December 31 2021 |  |
Cash | $ | 664 |  | 670 |  |  |  |  |
Demand Deposits | 1,413 |  | 1,554 |  |  |  |  |
Time Deposits |  |  |  |  |  |
1 to 90 days | 5,843 |  | 2,363 |  | 1,591 |  | 217 |  |  |
91 to 180 days |  |  | 137 |  | 4 |  |  |
Within one year |  |  | 34 |  | 4 |  |  |
U.S. Government Obligations |  |  |  |  |  |
1 to 90 days | 23 |  | 431 |  | — |  | — |  |  |
| $ | 7,943 |  | 5,018 |  | 1,762 |  | 225 |  |  |
Schedule of Debt Securities Carried at Fair Value | The following investments in debt securities classified as available for sale are carried at fair value on our consolidated balance sheet at September 30, 2022, and December 31, 2021:
| Millions of Dollars
| Carrying Amount
| Cash and Cash Equivalents | Short-Term Investments | Investments and Long-Term Receivables
| September 30 2022 | December 31 2021 | September 30 2022 | December 31 2021 | September 30 2022 | December 31 2021
Major Security Type |  |  |  |  |  |
Corporate Bonds | $ | — |  | 3 |  | 322 |  | 128 |  | 287 |  | 173 |
Commercial Paper | 67 |  | 7 |  | 216 |  | 82 |  |  |
U.S. Government Obligations | — |  | — |  | 101 |  | — |  | 68 |  | 2 |
U.S. Government Agency Obligations |  |  | 8 |  | 2 |  | — |  | 8 |
Foreign Government Obligations |  |  | 3 |  | 7 |  | 7 |  | 2 |
Asset-backed Securities |  |  | — |  | 2 |  | 118 |  | 63 |
| $ | 67 |  | 10 |  | 650 |  | 221 |  | 480 |  | 248 |
The following table summarizes the amortized cost basis and fair value of investments in debt securities classified as available for sale:
| Millions of Dollars
| Amortized Cost Basis | Fair Value
| September 30 2022 | December 31 2021 | September 30 2022 | December 31 2021
Major Security Type |  |  |  |
Corporate Bonds | $ | 621 |  | 305 |  | 609 |  | 304 |
Commercial Paper | 284 |  | 88 |  | 283 |  | 89 |
U.S. Government Obligations | 172 |  | 2 |  | 169 |  | 2 |
U.S. Government Agency Obligations | 8 |  | 10 |  | 8 |  | 10 |
Foreign Government Obligations | 10 |  | 9 |  | 10 |  | 9 |
Asset-backed Securities | 119 |  | 65 |  | 118 |  | 65 |
| $ | 1,214 |  | 479 |  | 1,197 |  | 479 |

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