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