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Summary Of Significant Accounting Policies (Assets, Liabilities And Net Assets Of Company's Argentinean Subsidiaries) (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Subsidiary or Equity Method Investee [Line Items]
Assets	$ 11,447	$ 10,101
Liabilities	9,867	8,570
Argentinean Subsidiaries [Member]
Subsidiary or Equity Method Investee [Line Items]
Assets	2,488	2,479
Liabilities	1,889	1,874
Net Assets	$ 599	$ 605

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Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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