Financial Instruments and Risk Management (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Derivative [Line Items]
Pre-tax net losses on cash flow hedges to be reclassified from AOCE into earnings in next twelve months	$ 32,000,000
Accretion expense	8,400,000	7,700,000
Contingent consideration | Minimum
Derivative [Line Items]
Rate used to discount net cash inflows to present value	0.70%
Contingent consideration | Maximum
Derivative [Line Items]
Rate used to discount net cash inflows to present value	11.10%
Changes during the period
Derivative [Line Items]
Adjustment to contingent consideration liability		1,900,000
Purchased cash convertible note hedge
Derivative [Line Items]
Fair value of credit risk derivatives	$ 1,540,000,000