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Derivative Instruments and Hedging Activities (Outstanding Derivative Notionals and Terms by Type) (Details) - USD ($) | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Derivative [Line Items] |  |
Derivative, notional amount | $ 2,000,000,000 |
Libor and Euribor [Member] | Interest Rate Contract |  |
Derivative [Line Items] |  |
Derivative, notional amount | 4,772,000,000 |
Unidad de Fomento (funds code) | Cross Currency Interest Rate Contract [Member] |  |
Derivative [Line Items] |  |
Derivative, notional amount | 246,000,000 |
Argentina, Pesos | Foreign Exchange Contract [Member] |  |
Derivative [Line Items] |  |
Derivative, notional amount | 56,000,000 |
Chilean Peso CLP [Member] | Foreign Exchange Contract [Member] |  |
Derivative [Line Items] |  |
Derivative, notional amount | 318,000,000 |
Colombian Peso COP [Member] | Foreign Exchange Contract [Member] |  |
Derivative [Line Items] |  |
Derivative, notional amount | 190,000,000 |
Brazil, Brazil Real | Foreign Exchange Contract [Member] |  |
Derivative [Line Items] |  |
Derivative, notional amount | 149,000,000 |
No currency | Foreign Exchange Contract [Member] |  |
Derivative [Line Items] |  |
Derivative, notional amount | 31,000,000 |
Other Noncurrent Assets [Member] |  |
Derivative [Line Items] |  |
Derivative Asset, Noncurrent | 138,000,000 | $ 99,000,000
Other Noncurrent Liabilities [Member] |  |
Derivative [Line Items] |  |
Derivative Liability, Noncurrent | 443,000,000 | $ 298,000,000
Natural Gas and Natural Gas Liquids [Member] |  |
Derivative [Line Items] |  |
Commodity Contract Asset, Current | 23,000,000 |
Energy [Domain] |  |
Derivative [Line Items] |  |
Commodity Contract Asset, Current | 6,000,000 |
Coal [Member] |  |
Derivative [Line Items] |  |
Commodity Contract Asset, Current | $ 7,000,000 |

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