Derivative Instruments and Hedging Activities - Part 1 (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Foreign Exchange Contract [Member]
Derivative Tables [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	$ 7,000,000	$ 1,000,000	$ (2,000,000)	$ 5,000,000
Fair Value Measurements With Unobservable Inputs Reconciliation Recurring Basis Regulatory Assets Liabilities	0	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements	9,000,000	1,000,000	21,000,000	2,000,000
Derivative Liability, Fair Value, Gross Liability	(46,000,000)		(46,000,000)		$ (44,000,000)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Period Increase (Decrease)	(16,000,000)	(2,000,000)	(13,000,000)	(6,000,000)
Interest Rate Contract [Member]
Derivative Tables [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	0	1,000,000	(2,000,000)	1,000,000
Fair Value Measurements With Unobservable Inputs Reconciliation Recurring Basis Regulatory Assets Liabilities	0	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements	(10,000,000)	(2,000,000)	(10,000,000)	(4,000,000)
Derivative Liability, Fair Value, Gross Liability	(793,000,000)		(793,000,000)		(328,000,000)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Period Increase (Decrease)	0	0	0	0
Interest Rate Contract [Member] | Libor and Euribor [Member]
Derivative Tables [Line Items]
Derivatives, notional amount	5,852,000,000		5,852,000,000
Cross currency derivatives [Member]
Derivative Tables [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	0	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)	5,000,000	0	(14,000,000)
Fair Value Measurements With Unobservable Inputs Reconciliation Recurring Basis Regulatory Assets Liabilities	0	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements	(1,000,000)	0	(2,000,000)
Derivative Liability, Fair Value, Gross Liability	(45,000,000)		(45,000,000)		(21,000,000)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Period Increase (Decrease)	0	0	0
Commodity Contract [Member]
Derivative Tables [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	0	(1,000,000)	(1,000,000)	(1,000,000)
Fair Value Measurements With Unobservable Inputs Reconciliation Recurring Basis Regulatory Assets Liabilities	1,000,000	1,000,000	2,000,000	(1,000,000)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements	0	0	1,000,000	0
Derivative Liability, Fair Value, Gross Liability	(65,000,000)		(65,000,000)		(31,000,000)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Period Increase (Decrease)	0	1,000,000	1,000,000	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	7,000,000	1,000,000	(5,000,000)	5,000,000
Fair Value Measurements With Unobservable Inputs Reconciliation Recurring Basis Regulatory Assets Liabilities	1,000,000	1,000,000	2,000,000	(1,000,000)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements	(2,000,000)	(1,000,000)	10,000,000	(2,000,000)
Derivative Liability, Fair Value, Gross Liability	(949,000,000)		(949,000,000)		$ (424,000,000)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Period Increase (Decrease)	(16,000,000)	(1,000,000)	(12,000,000)	(6,000,000)
Natural Gas and Natural Gas Liquids [Member]
Derivative Tables [Line Items]
Commodity Contract Asset, Current	60,000,000		60,000,000
Energy [Domain]
Derivative Tables [Line Items]
Commodity Contract Asset, Current	5,000,000		5,000,000
Coal [Member]
Derivative Tables [Line Items]
Commodity Contract Asset, Current	9,000,000		9,000,000
Unidad de Fomento (funds code) | Cross currency derivatives [Member]
Derivative Tables [Line Items]
Derivatives, notional amount	229,000,000		229,000,000
Argentina, Pesos | Foreign Exchange Contract [Member]
Derivative Tables [Line Items]
Derivatives, notional amount	73,000,000		73,000,000
Chile, Pesos | Foreign Exchange Contract [Member]
Derivative Tables [Line Items]
Derivatives, notional amount	147,000,000		147,000,000
Colombia, Pesos | Foreign Exchange Contract [Member]
Derivative Tables [Line Items]
Derivatives, notional amount	125,000,000		125,000,000
Mexico, Pesos | Foreign Exchange Contract [Member]
Derivative Tables [Line Items]
Derivatives, notional amount	202,000,000		202,000,000
Euro Member Countries, Euro | Foreign Exchange Contract [Member]
Derivative Tables [Line Items]
Derivatives, notional amount	91,000,000		91,000,000
Other unspecified currency [Domain] | Foreign Exchange Contract [Member]
Derivative Tables [Line Items]
Derivatives, notional amount	26,000,000		26,000,000
Other comprehensive income - Derivative activity [Member] | Foreign Exchange Contract [Member]
Derivative Tables [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)	(7,000,000)	0	1,000,000	0
Other comprehensive income - Derivative activity [Member] | Interest Rate Contract [Member]
Derivative Tables [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)	(21,000,000)	(75,000,000)	(71,000,000)	(88,000,000)
Other comprehensive income - Derivative activity [Member] | Cross currency derivatives [Member]
Derivative Tables [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)				0
Other comprehensive income - Derivative activity [Member] | Commodity Contract [Member]
Derivative Tables [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)	0	0	0	0
Other comprehensive income - Derivative activity [Member]
Derivative Tables [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)	$ (23,000,000)	$ (75,000,000)	$ (84,000,000)	$ (88,000,000)