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Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
NET INCOME	$ 320	$ 1,369
OTHER COMPREHENSIVE INCOME (LOSS):
Pension and OPEB prior service costs	(7)	(18)
Amortized losses on derivative hedges	1	15
Change in unrealized gains on AFS securities	0	(106)
Other comprehensive loss	(6)	(109)
Income tax benefits on other comprehensive loss	(1)	(53)
Other comprehensive loss, net of tax	(5)	(56)
COMPREHENSIVE INCOME	$ 315	$ 1,313

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OTHER COMPREHENSIVE INCOME:.

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