Other - Net, Expense (Income) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Income related to transfer of exenatide rights	$ 0	$ 0	$ (495.4)	$ 0
Interest Expense	40.3	43.0	80.6	88.3
Investment Income, Interest	(29.7)	(27.2)	(53.3)	(53.3)
Other (income)expense	(22.5)	0.7	(73.0)	27.5
Nonoperating Income (Expense), Total	$ (11.9)	$ 16.5	$ (541.1)	$ 62.5