Debt Credit Agreements (Details) (Line of Credit [Member], USD $)	0 Months Ended
	Jan. 22, 2014	Mar. 31, 2014
Line of Credit [Member]
Line of Credit Facility [Line Items]
Short-term line of credit agreement	$ 1,000,000,000
Short-term line of credit agreement term	364 days
Short-term line of credit agreement, amount outstanding		$ 0