Income Taxes (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	12 Months Ended
	Aug. 31, 2007	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Taxes [Line Items]
Federal statutory rate		35.00%	35.00%	35.00%
Foreign Earnings Repatriated				$ 740.9
Foreign Withholding Tax				28.1
income tax benefit, related to worthless stock deduction				$ 8.6
Undistributed earnings of foreign subsidiaries		$ 264.1
unrecognized tax benefits offset against deferred tax asset		926.7
Alternative minimum tax credits		17.6
Tax Credit Carryforward, Amount		$ 143.9
Impact of tax holiday on diluted earnings per share		$ 0.16	$ 0.14	$ 0.50
Foreign Income Tax Paid, Net		$ 14.5
Debt Instrument, Interest Rate, Stated Percentage		3.25%
Tax credit carryforward expiration		2017 through 2034
Debt Instruments, Discount Rate	8.50%	8.50%
Liability for Uncertain Tax Positions, Noncurrent		$ 212.0
Federal [Member]
Income Taxes [Line Items]
Net operating loss carryforwards		6.8
Federal research tax credits		13.5
capital loss carryforward		3,000.0
State [Member]
Income Taxes [Line Items]
Net operating loss carryforwards		1,400.0
Federal research tax credits		2.9
capital loss carryforward		3,100.0
Foreign [Member]
Income Taxes [Line Items]
Net operating loss carryforwards		$ 16.5
Tax credit carryforward expiration		2024
Federal And State [Member]
Income Taxes [Line Items]
Operating Loss Carryforwards, Date		2017 through 2034