Postretirement Benefit Plans (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block
Other Postretirement Benefit Expense	$ 1	$ 1
Postretirement Benefit Plans (Textual) [Abstract]
Employer Contribution to definer benefit Plan		11
Minimum
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block
Additional contributions	30
Maximum
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block
Additional contributions	$ 40