Equity (Tables)

3 Months Ended

Mar. 31, 2016

Equity [Abstract]

Schedule of Stockholders Equity [Table Text Block]

The activity in equity during the three months ended March 31, 2016 and 2015 is as follows (dollars in millions):

	Common Stock				Accumulated Other Comprehensive Loss			Retained Earnings
	Shares	Amount									Total
Balances as of December 31, 2015	88,792,751	$	1,196		$	(8	)	$	1,070		$	2,258
Issuances of shares pursuant to equity-based plans	106,608	—			—			—			—
Stock-based compensation	—	(1		)	—			—			(1		)
Dividends declared	—	—			—			(27		)	(27		)
Net income	—	—			—			61			61
Balances as of March 31, 2016	88,899,359	$	1,195		$	(8	)	$	1,104		$	2,291
Balances as of December 31, 2014	78,228,339	$	918		$	(7	)	$	1,000		$	1,911
Issuances of shares pursuant to equity-based plans	116,352	1			—			—			1
Stock-based compensation	—	(1		)	—			—			(1		)
Dividends declared	—	—			—			(22		)	(22		)
Net income	—	—			—			50			50
Balances as of March 31, 2015	78,344,691	$	918		$	(7	)	$	1,028		$	1,939