Financial Instruments and Risk Management (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended				3 Months Ended	9 Months Ended				0 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 Contingent consideration Minimum	Sep. 30, 2014 Contingent consideration Maximum	Sep. 30, 2013 Changes during the period	Sep. 30, 2013 Changes during the period	Sep. 30, 2014 Interest Rate Swap	Aug. 27, 2014 Interest Rate Swap	Sep. 30, 2014 Purchased cash convertible note hedge	Dec. 04, 2013 Agila Specialties	Sep. 30, 2014 Agila Specialties	Sep. 30, 2014 Agila Specialties
Derivative [Line Items]
Derivative, Notional Amount										$ 575,000,000
Maximum Length of Time Hedged in Cash Flow Hedge									10 years 0 months 0 days
Fair value of credit risk derivatives											1,390,000,000
Pre-tax net losses on cash flow hedges to be reclassified from AOCE into earnings in next twelve months			32,000,000
Rate used to discount net cash inflows to present value					0.60%	10.30%						13.00%
Payments for contingent consideration			150,000,000	0										150,000,000
Purchase consideration, contingent consideration												230,000,000
Adjustment to contingent consideration liability							15,000,000	3,100,000					80,000,000
Purchase consideration, contingent consideration, maximum												250,000,000	211,000,000	211,000,000
Accretion expense	$ 9,000,000	$ 8,200,000	$ 26,100,000	$ 23,900,000