Income Taxes (Tables)

12 Months Ended

Dec. 31, 2018

Income Tax Disclosure [Abstract]

Schedule of Income Tax Expense (Benefit) and Effective Income Tax Rate

The following table provides a summary of the current and deferred components of income tax expense (benefit) from continuing operations:

	Years Ended December 31,
	2018		2017			2016
Current expense (benefit):
Federal	$	30	$	(10	)	$	8
State	7		(1		)	—
Total	37		(11		)	8
Deferred expense (benefit):
Federal	$	2	$	(253	)	$	(11	)
State	10		1			(10		)
Total	12		(252		)	(21		)
Total income tax expense (benefit)	$	49	$	(263	)	$	(13	)

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

The differences between the Company’s effective income tax rate and the United States federal income tax statutory rate were as follows:

	Years Ended December 31,
	2018		2017			2016
Income tax expense (benefit) at federal statutory rate	$	33	$	(108	)	$	(231	)
Changes in income taxes resulting from:
Federal tax rate change	—		(249		)	—
State income taxes, net of federal income tax benefit	14		1			(6		)
Non-deductible goodwill impairment	—		92			223
Other	2		1			1
Income tax expense (benefit)	$	49	$	(263	)	$	(13	)

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

The table below summarizes the principal components of the Company’s deferred tax assets (liabilities) as follows:

	December 31,
	2018			2017
Deferred income tax assets:
Other postretirement benefits	$	18		$	3
Debt amortization	11			12
Other	74			65
Total deferred income tax assets	103			80
Valuation allowance	—			(2		)
Net deferred income tax assets (included within other non-current assets, net)	$	103		$	78
Deferred income tax liabilities:
Property, plant and equipment	$	(497	)	$	(484	)
Investment in unconsolidated affiliates	(2		)	(5		)
Other	(41		)	(40		)
Total deferred income tax liabilities	(540		)	(529		)
Net deferred income tax liability	$	(437	)	$	(451	)