Gain (loss) related to the termination of a contract between the parties. The termination may be due to many causes including early termination of a lease by a lessee, a breach of contract by one party, or a failure to perform.

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Amount of the cost of borrowed funds accounted for as interest expense.

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Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities.

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The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business).

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Revenues from the sale of other goods or rendering of other services, not elsewhere specified in the taxonomy; net of (reduced by) sales adjustments, returns, allowances, and discounts.

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Other - Net, Expense (Income) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Other Revenue, Net									$ 788.4us-gaap_OtherSalesRevenueNet	$ 707.5us-gaap_OtherSalesRevenueNet	$ 633.0us-gaap_OtherSalesRevenueNet
Income related to termination of the exenatide collaboration with Amylin									0us-gaap_GainLossOnContractTermination	(495.4)us-gaap_GainLossOnContractTermination	(787.8)us-gaap_GainLossOnContractTermination
Interest Expense									148.8us-gaap_InterestExpense	160.1us-gaap_InterestExpense	177.8us-gaap_InterestExpense
Investment Income, Interest									(121.0)us-gaap_InvestmentIncomeInterest	(119.7)us-gaap_InvestmentIncomeInterest	(105.0)us-gaap_InvestmentIncomeInterest
Other (income)expense									(368.3)us-gaap_OtherNonoperatingIncomeExpense	(63.9)us-gaap_OtherNonoperatingIncomeExpense	41.0us-gaap_OtherNonoperatingIncomeExpense
Nonoperating Income (Expense), Total	(137.2)us-gaap_NonoperatingIncomeExpense	(93.5)us-gaap_NonoperatingIncomeExpense	(53.8)us-gaap_NonoperatingIncomeExpense	(56.0)us-gaap_NonoperatingIncomeExpense	(9.1)us-gaap_NonoperatingIncomeExpense	31.3us-gaap_NonoperatingIncomeExpense	(11.9)us-gaap_NonoperatingIncomeExpense	(529.2)us-gaap_NonoperatingIncomeExpense	(340.5)us-gaap_NonoperatingIncomeExpense	(518.9)us-gaap_NonoperatingIncomeExpense	(674.0)us-gaap_NonoperatingIncomeExpense
Exenatide [Member]
Other Revenue, Net										0	70.1
Other (income)expense										$ (495.4)	$ (787.8)