Taxation (Deferred Tax Assets and Liabilities, and Valuation Allowances) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Deferred tax assets:
Deferred revenue	$ 5.5	$ 6.0
Inventory & warranty provisions	52.5	43.3
Losses carried forward (including tax credits)	425.7	384.8
Provision for sales deductions and doubtful accounts	144.9	119.5
Restructuring	0.8	0.7
Intangible assets	36.9	44.0
Share-based compensation	32.7	34.8
Other	64.7	34.1
Gross deferred tax assets	763.7	667.2
Less: valuation allowance	(268.6)	(211.8)
Deferred tax assets, net	495.1	455.4
Deferred tax liabilities:
Intangible assets	(702.7)	(691.5)
Excess of book value over tax value of assets	(36.8)	(22.2)
Net deferred tax liabilities	(244.4)	(258.3)
Balance Sheet Classifications
Deferred tax assets - current	229.9	207.6
Deferred tax assets - non-current	46.5	50.7
Deferred tax liabilities - non-current	(520.8)	(516.6)
Valuation Allowance [Line Items]
Net increase in valuation allowances	56.8
Ireland
Valuation Allowance [Line Items]
Valuation allowances	73.9	68.5
United States
Valuation Allowance [Line Items]
Valuation allowances	37.2	33.9
Germany
Valuation Allowance [Line Items]
Valuation allowances	96.9	80.7
Other foreign tax jurisdictions
Valuation Allowance [Line Items]
Valuation allowances	$ 60.6	$ 28.7