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Property, Plant and Equipment (Table of Property and Equipment, net) (Parenthetical) (Details) - USD ($) $ in Millions		Jun. 30, 2020	Dec. 31, 2019
Property Plant And Equipment [Line Items]
Other property and equipment, net	[1]	$ 1,013	$ 1,035
CDM [Member]
Property Plant And Equipment [Line Items]
Other property and equipment, net		$ 96	$ 80
[1] $96 million and $80 million related to CDM in 2020 and 2019, respectively.

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- Definition

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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- Definition

Amount after depreciation of long-lived, physical assets used to produce goods and services and not intended for resale, classified as other.

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