Income Taxes (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Contingency [Line Items]
Deferred tax liability not recognized, amount of unrecognized deferred tax liability, undistributed earnings of foreign subsidiaries	$ 1,400.0
Statutory tax rate	20.00%	35.00%	35.00%
Deferred tax assets, goodwill		$ 156.0
Valuation allowance, amount	$ 355.7	304.5
Change in valuation allowance, deferred tax asset	51.2
Net operating loss carryforwards	2,300.0
Unrecognized tax benefit	174.1	191.2	$ 174.7	$ 132.4
Unrecognized tax benefits that impact effective tax rate	128.1	141.2
Accrued interest and penalties	73.1	72.3
Interest expense (income) related to uncertain tax positions	0.8	$ 2.2	$ 0.5
Amount of unrecognized deferred tax liability	95.0
Foreign
Income Tax Contingency [Line Items]
Net operating loss carryforwards	992.0
Capital loss carryforward	84.8
Credit carryforward	41.6
Indefinite | Foreign
Income Tax Contingency [Line Items]
Net operating loss carryforwards	608.0
2016 through 2035 | Foreign
Income Tax Contingency [Line Items]
Net operating loss carryforwards	$ 384.0