Equity (Tables)

6 Months Ended

Jun. 30, 2015

Equity [Abstract]

Schedule of Stockholders Equity [Table Text Block]

The activity in equity during the six months ended June 30, 2015 and 2014 is as follows (dollars in millions):

	Common Stock			Accumulated Other Comprehensive Loss			Retained Earnings
	Shares	Amount								Total
Balances as of December 31, 2014	78,228,339	$	918	$	(7	)	$	1,000		$	1,911
Issuance of common stock, net of issuance costs of $12	10,400,000	271		—			—			271
Issuances of shares pursuant to equity-based plans	137,290	1		—			—			1
Stock-based compensation	—	1		—			—			1
Dividends declared	—	—		—			(48		)	(48		)
Net income	—	—		—			85			85
Balances as of June 30, 2015	88,765,629	$	1,191	$	(7	)	$	1,037		$	2,221
Balances as of December 31, 2013	78,085,559	$	911	$	(5	)	$	913		$	1,819
Issuances of shares pursuant to equity-based plans	116,682	—		—			—			—
Stock-based compensation	—	3		—			—			3
Dividends declared	—	—		—			(44		)	(44		)
Net income	—	—		—			93			93
Balances as of June 30, 2014	78,202,241	$	914	$	(5	)	$	962		$	1,871