Derivative Financial Instruments (Contractual and Weighted-Average Interest Rates, Which Include the Effects of Hedges Related to Financial Instruments) (Details) (Long-term debt)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Long-term debt
Derivative [Line Items]
Contractual Rates	3.53%	3.40%	3.46%	3.57%
Rate Including Impact of Hedges	2.73%	2.65%	2.66%	2.83%