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Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
NET INCOME	$ 74	$ 320
OTHER COMPREHENSIVE INCOME (LOSS):
Pension and OPEB prior service costs	(23)	(7)
Amortized losses on derivative hedges	0	1
Other comprehensive loss	(23)	(6)
Income tax benefits on other comprehensive loss	(5)	(1)
Other comprehensive loss, net of tax	(18)	(5)
COMPREHENSIVE INCOME	$ 56	$ 315

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OTHER COMPREHENSIVE INCOME:.

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners.

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