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Fair Value Measurements (Details) - USD ($) $ in Millions | Sep. 30, 2021 | Dec. 31, 2020 | Sep. 30, 2020
--- | --- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |  |  |  |  |
Derivative Asset |  | $ 57 |  | $ 55 |  | $ 126
Derivative Liability |  | 40 |  | 135 |  | 97
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |  |  |  |  |
Equity Securities, | [1] | 75 |  |  |  |
Assets at Fair Value |  | 75 |  | 226 |  |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 | US Treasury Securities |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |  |  |  |  |
Debt Securities, Available-for-sale | [2] |  |  | 226 |  |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |  |  |  |  |
Assets at Fair Value |  | 160 |  | 98 |  | 278
Liabilities at Fair Value |  | 40 |  | 135 |  | 97
Marketable Securities |  | 103 |  | 43 |  | 152
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Foreign Currency Contract [Member] |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |  |  |  |  |
Derivative Asset |  | 57 | [3] | 55 | [3] | 125
Derivative Liability |  | $ 40 | [3] | $ 135 | [3] | 96
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Commodity Contract [Member] |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] |  |  |  |  |  |
Derivative Asset | [3] |  |  |  |  | 1
Derivative Liability | [3] |  |  |  |  | $ 1
[1] | The company's equity securities are included in other assets in the interim Consolidated Balance Sheets.
[2] | The company's investments in debt securities, which are available-for-sale, are included in "marketable securities" in the interim Consolidated Balance Sheets
[3] | See Note 16 - Financial Instruments for the classification of derivatives in the interim Consolidated Balance Sheets.3. The company's equity securities are included in other assets in the interim Consolidated Balance Sheets.

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