Stock-Based Compensation (Details Textuals) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Schedule of Stock Based Compensation [Line Items]
Authorized limit of common stock shares	11,500,000
Performance Units Price per Unit	1.00
Expiration Period After Date of Grant	10 years
Award Vesting Period	3 years
Weighted Average Remaining Contractual Term	3 years 9 months 30 days
Options, Vested, Number of Shares	200,844
Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 0
Options, Exercises in Period, Total Intrinsic Value	$ 12	$ 25	$ 20
Stock or Unit Option Plan Expense	0	0.7	2.0
Unrecognized Compensation Cost	55
Weighted Average to be Recognized	11 months 5 days
Employee Stock Option [Member]
Schedule of Stock Based Compensation [Line Items]
Maximum Award Per Employee	500,000
Restricted Stock [Member]
Schedule of Stock Based Compensation [Line Items]
Maximum Award Per Employee	150,000
Unrecognized Compensation Cost	10
Weighted Average to be Recognized	11 months 5 days
Performance Shares [Member]
Schedule of Stock Based Compensation [Line Items]
Maximum Award Per Employee	300,000
Unrecognized Compensation Cost	$ 45
Weighted Average to be Recognized	11 months 5 days
Performance Unit [Member]
Schedule of Stock Based Compensation [Line Items]
Maximum Award Per Employee	1,000,000