Financing Receivables (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($) agreement	Dec. 31, 2019 USD ($)
Schedule of Financing Receivables [Line Items]
Financing receivable	$ 101	$ 109
Number of Foninvemem Agreements | agreement	3
Foninvemem Agreement, collection period	10 years
Financing Receivable, before Allowance for Credit Loss	$ 110
Financing Receivable, Allowance for Credit Loss	9
Deferred Income	438	34
ARGENTINA
Schedule of Financing Receivables [Line Items]
Financing receivable	39	64
Derivative Assets, Gross	146	94
Financing Receivable, before Allowance for Credit Loss	48
Financing Receivable, Allowance for Credit Loss	9
Other Entity [Member]
Schedule of Financing Receivables [Line Items]
Financing receivable	31	12
Financing Receivable, before Allowance for Credit Loss	31
Financing Receivable, Allowance for Credit Loss	0
CHILE
Schedule of Financing Receivables [Line Items]
Financing receivable	31	$ 33
Financing Receivable, before Allowance for Credit Loss	31
Financing Receivable, Allowance for Credit Loss	0
Accounts Receivable, before Allowance for Credit Loss	105
Receivables, Net, Current	77
Accounts Receivable, Noncurrent, Nonaccrual	8
Receivable with Imputed Interest, Discount	20
Deferred Income	$ 23