Condensed Parent Company Statements of Cash Flows (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash flows from operating activities	$ 360	$ 349	$ 413
Cash flow from investing activities
Additions to fixed assets and capitalized software	(24)	(23)	(28)
Net cash provided by (used in) investing activities	130	(23)	(12)
Cash flow from financing activities
Debt repayments	(505)	(401)	(255)
Net cash (used in) financing activities	(506)	(412)	(271)
Increase (decrease) in cash and cash equivalents	(16)	(86)	130
Cash and cash equivalents, beginning of year	172	258	128
Cash and cash equivalents, end of year	156	172	258
Parent Company
Cash flows from operating activities	0	2	40
Cash flow from investing activities
Additions to fixed assets and capitalized software	0	0	0
Contributions to subsidiaries	0	0	(12)
Intercompany loan	0	0	(2)
Net cash provided by (used in) investing activities	0	0	(14)
Cash flow from financing activities
Debt repayments	0	(27)	0
Net cash (used in) financing activities	0	(27)	0
Increase (decrease) in cash and cash equivalents	0	(25)	26
Cash and cash equivalents, beginning of year	3	28	2
Cash and cash equivalents, end of year	$ 3	$ 3	$ 28