Taxes on Income (Tables)

12 Months Ended

Dec. 31, 2017

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,
	2017			2016			2015
Current expense (benefit):
Federal	$	(10	)	$	8		$	21
State	(1		)	—			—
Total	(11		)	8			21
Deferred expense (benefit):
Federal	$	(253	)	$	(11	)	$	17
State	1			(10		)	14
Total	(252		)	(21		)	31
Total income tax expense (benefit)	$	(263	)	$	(13	)	$	52

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,
	2017			2016			2015
Computed statutory income tax expense (benefit) at 35%	$	(108	)	$	(231	)	$	55
Changes in income taxes resulting from:
Federal tax rate change	(249		)	—			—
State income taxes, net of federal income tax benefit	1			(6		)	9
Non-deductible goodwill impairment	92			223			—
Audit settlements	—			—			(7		)
Other	1			1			(5		)
Income tax expense (benefit)	$	(263	)	$	(13	)	$	52

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,
	2017			2016
Deferred income tax assets:
Other postretirement benefits	$	3		$	4
Debt amortization	12			30
Other	65			37
Total deferred income tax assets	80			71
Valuation allowance	(2		)	(2		)
Net deferred income tax assets (included within other non-current assets, net)	$	78		$	69
Deferred income tax liabilities:
Property, plant and equipment	$	(484	)	$	(770	)
Investment in unconsolidated affiliates	(5		)	(6		)
Other	(40		)	(4		)
Total deferred income tax liabilities	(529		)	(780		)
Net deferred income tax liability	$	(451	)	$	(711	)