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Fair Value Measurements (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Assets: |  |
Investments | $ 11 | $ 11
Foreign Exchange Contracts | 1 | 11
Total Assets at Fair Value | 12 | 22
Liabilities: |  |
Foreign Exchange Contracts | 34 | 19
Total Liabilities at Fair Value | 34 | 19
Supplemental Fair Value Information |  |
Carrying amount — liability | 5,334 | 5,066
Notes Payable and Overdrafts | 406 | 348
Fixed Rate Debt, Excluding Capital Leases |  |
Supplemental Fair Value Information |  |
Carrying amount — liability | 4,094 | 3,434
Fair value — liability | 4,283 | 3,558
Notes Payable and Overdrafts | 227 | 143
Variable Rate Debt, Excluding Capital Leases |  |
Supplemental Fair Value Information |  |
Carrying amount — liability | 1,240 | 1,632
Fair value — liability | 1,197 | 1,632
Notes Payable and Overdrafts | 179 | 205
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) |  |
Assets: |  |
Investments | 11 | 11
Foreign Exchange Contracts | 0 | 0
Total Assets at Fair Value | 11 | 11
Liabilities: |  |
Foreign Exchange Contracts | 0 | 0
Total Liabilities at Fair Value | 0 | 0
Supplemental Fair Value Information |  |
Fair value — liability | 4,391 | 3,808
Significant Other Observable Inputs (Level 2) |  |
Assets: |  |
Investments | 0 | 0
Foreign Exchange Contracts | 1 | 11
Total Assets at Fair Value | 1 | 11
Liabilities: |  |
Foreign Exchange Contracts | 34 | 19
Total Liabilities at Fair Value | 34 | 19
Significant Unobservable Inputs (Level 3) |  |
Assets: |  |
Investments | 0 | 0
Foreign Exchange Contracts | 0 | 0
Total Assets at Fair Value | 0 | 0
Liabilities: |  |
Foreign Exchange Contracts | 0 | 0
Total Liabilities at Fair Value | $ 0 | $ 0

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