Debt (Narrative) (Details) (USD $)	3 Months Ended	9 Months Ended			9 Months Ended
	Mar. 31, 2014	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Sep. 30, 2014 Senior Notes [Member] U S T [Member]	Sep. 30, 2014 Revolving Credit Facility [Member] Credit Agreement [Member]	Sep. 30, 2014 Senior Notes [Member] U S T [Member]	Sep. 29, 2014 Senior Notes [Member] U S T [Member]
Debt Instrument [Line Items]
Term of extension						1 year
Short-term borrowings		$ 0		$ 0
Maximum borrowing capacity						3,000,000,000
Term of debt						5 years
Line of Credit Facility, Expiration Date						Aug. 19, 2019
Credit line available under the agreement						3,000,000,000
Aggregate principal amount of debt redeemed		1,300,000,000		525,000,000			300,000,000
Repayments of Long-term Debt	525,000,000	525,000,000	0
Interest Rate								5.75%
Loss on extinguishment of debt (approximately)					$ 45,000,000