Related Party Transactions (Schedule of Related Party Receivables Payables) (Details) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Affiliated Entity [Member]
Related Party Transaction [Line Items]
Receivables from Related Parties		$ 252	$ 370
Accounts and notes payable to related parties (1)	[1]	1,765	1,976
Strabag_EPC Contractor_Related Party [Member]
Related Party Transaction [Line Items]
Accounts and notes payable to related parties (1)		379	287
Banco General_Related Party [Member]
Related Party Transaction [Line Items]
Accounts and notes payable to related parties (1)		$ 181	$ 415

[1] Includes $1 billion of debt to Mong Duong Finance Holdings B.V., an SPV accounted for as an equity affiliate as of December 31, 2020 and 2019 (see Note 11—Debt). As of December 31, 2020, the debt balance at the SPV was reclassified to held-for-sale liabilities on the Consolidated Balance Sheet. Also includes $181 million and $415 million of debt to Banco General S.A., a bank in Panama where our minority partner in Colon is part of its board of directors as of December 31, 2020 and 2019, respectively; and $379 million and $287 million of debt to Strabag, our EPC contractor and minority partner in Alto Maipo as of December 31, 2020 and 2019, respectively.