Accumulated Other Comprehensive Income (Tables)

12 Months Ended

Dec. 31, 2015

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)

The following tables provide the components of AOCI by component (in millions):

	Pension and Retiree Health and Welfare Benefit Itemsa			Equity Method Investments			Total
Balance at December 31, 2014	$	—		$	(2	)	$	(2	)
Other comprehensive income before reclassifications	50			—			50
Amounts reclassified from AOCI	—			—			—
Balance at December 31, 2015	$	50		$	(2	)	$	48
Balance at December 31, 2013	$	251		$	(6	)	$	245
Other comprehensive (loss) income before reclassifications	(250		)	4			(246		)
Amounts reclassified from AOCI	(1		)	—			(1		)
Balance at December 31, 2014	$	—		$	(2	)	$	(2	)

^a Amounts are net of tax. See Note 13 for additional details.

Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]

Reclassifications out of AOCIb
	Year Ended			Year Ended
Details about AOCI Components	December 31, 2015			December 31, 2014			Income Statement Line Item
Amortization of pension and retiree health and welfare benefit items
Actuarial losses	$	(4	)	$	(2	)	c
Prior service credits	3			3			c
	(1		)	1			Total before tax
	1			—			Tax (expense) / benefit
Total reclassifications for the period	$	—		$	1		Net of tax

^b Amounts in parenthesis indicate debits to the income statement.

^c This accumulated other comprehensive income component is included in the computation of net periodic pension and retiree health and welfare cost (see Note 13 for additional details).