Income Taxes (Deferred tax asset and liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Deferred tax assets:
Compensation and benefits	$ 1,021.7	$ 1,126.0
Purchases of intangible assets	443.1	620.3
Tax credit carryforwards and carrybacks	473.0	458.9
Tax loss carryforwards and carrybacks	501.4	327.3
Contingent consideration	41.8	142.7
Product return reserves	88.4	128.1
Other comprehensive loss on hedging transactions	68.9	123.3
Debt	53.5	95.3
Other	555.8	587.3
Total gross deferred tax assets	3,247.6	3,609.2
Valuation allowances	(709.1)	(648.3)
Total deferred tax assets	2,538.5	2,960.9
Deferred tax liabilities:
Inventories	(654.8)	(955.5)
Unremitted earnings	(16.6)	(673.6)
Intangibles	(314.6)	(604.2)
Property and equipment	(282.1)	(398.6)
Financial instruments	(41.5)	(279.3)
Prepaid employee benefits	(231.5)	(265.3)
Total deferred tax liabilities	(1,541.1)	(3,176.5)
Deferred Tax Assets, Net	$ 997.4
Deferred tax liabilities		$ (215.6)