Schedule II - Valuation and Qualifying Accounts (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning balance	$ 739.0		$ 709.5		$ 624.9
Provision charged to income	1,768.5	[1]	1,340.5	[1]	1,234.9	[1]
Costs incurred/utilization	(1,582.4)	[1]	(1,311.0)	[1]	(1,150.3)	[1]
Ending balance	925.1		739.0		709.5
Accrued rebates - Medicaid and HMOs
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning balance	640.5		612.6		549.9
Provision charged to income	1,626.6	[1]	1,228.0	[1]	1,123.2	[1]
Costs incurred/utilization	(1,460.6)	[1]	(1,200.1)	[1]	(1,060.5)	[1]
Ending balance	806.5		640.5		612.6
Sales returns reserve
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning balance	90.5		88.8		69.8
Provision charged to income	34.5	[1]	40.8	[1]	51.2	[1]
Costs incurred/utilization	(27.1)	[1]	(39.1)	[1]	(32.2)	[1]
Ending balance	97.9		90.5		88.8
Accrued coupons
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning balance	8.0		8.1		5.2
Provision charged to income	107.4	[1]	71.7	[1]	60.5	[1]
Costs incurred/utilization	(94.7)	[1]	(71.8)	[1]	(57.6)	[1]
Ending balance	$ 20.7		$ 8.0		$ 8.1

[1] In the analysis above, due to systems limitations, it is not practical and has not been necessary to break out current versus prior year activity. When applicable, Shire has performed general ledger reviews of sales deduction provisions charged to income, and the utilization of these provisions in subsequent years. Shire has determined that adjustments made in each year as a result of changes to estimates that related to prior year sales, and adjustments made as a result of differences between prior period provisions and actual payments, did not have a material impact on the Company’s financial performance or position either in each individual year, or in the Company’s performance over the reported period.