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Related Parties (Details) - TTX Company [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Related Party Transaction [Line Items]
Equity Method Investment, Ownership Percentage	36.79%
Equity Method Investments	$ 1,400		$ 1,400
Related Party Transaction, Expenses from Transactions with Related Party	96	$ 105
Accounts Payable, Related Parties, Current	$ 65		$ 62

X

- Definition

Amount for accounts payable to related parties. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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