Fair Value Of Financial Instruments (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014
Fair value assumptions expected volatility rate	26.00%
fair value hypothetical increase decrease in volatility rate	5.00%
fair value assumptions credit spread	4.00%
fair value hypothetical increase decrease in credit spread	1.00%
Convertible Debt, Fair Value Disclosures	$ 2,000,000,000
Debt Instrument, Fair Value Disclosure	$ 741,100,000