Defined Contribution and Defined Benefit Plans (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Contribution and Defined Benefit Plans [Abstract]
Defined Contribution Plan, Cost Recognized	$ 11	$ 12	$ 10
Employer Matching Contribution Percentage	100.00%
Deferral Election Percentage For Employer Matching Contribution	5.00%
Employee Deferral Limit Percentage	75.00%
Defined Benefit Plan, Assets for Plan Benefits	14	12
Pension and Other Postretirement Defined Benefit Plans, Liabilities	20	21
Defined Benefit Plan, Amounts Recognized in Balance Sheet	6	9
Defined Benefit Plan, Net Periodic Benefit Cost	2	1	1
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax	1	5
Defined Benefit Plan, Estimated Future Employer Contributions in Current Fiscal Year	1	2
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year	2
Defined Benefit Plan, Expected Future Benefit Payments in Five Fiscal Years Thereafter	$ 1