Consolidated Statements of Changes in Shareholder's Equity (USD $) In Millions, except Share data, unless otherwise specified	Total	Common Stock	Other Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss, Net
Balance at Dec. 31, 2012	$ 2,923	$ 0	$ 2,308	$ 619	$ (4)
Balance (shares) at Dec. 31, 2012		1,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	64			64
Dividends declared	(80)			(80)
Balance at Jun. 30, 2013	2,907	0	2,308	603	(4)
Balance (shares) at Jun. 30, 2013		1,000
Balance at Dec. 31, 2013	2,890	0	2,308	586	(4)
Balance (shares) at Dec. 31, 2013	1,000	1,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	68			68
Other	1				1
Balance at Jun. 30, 2014	$ 2,959	$ 0	$ 2,308	$ 654	$ (3)
Balance (shares) at Jun. 30, 2014	1,000	1,000