Income Taxes (Narrative) (Details) (USD $)	1 Months Ended	3 Months Ended	12 Months Ended
	Aug. 31, 2007 Rate	Dec. 31, 2013	Dec. 31, 2014 Rate	Dec. 31, 2013 Rate	Dec. 31, 2012 Rate
Income Taxes [Line Items]
Liability for Uncertain Tax Positions, Noncurrent			$ 210,300,000
Federal statutory rate			35.00%	35.00%	35.00%
income tax benefit, related to worthless stock deduction		375,300,000
Foreign Earnings Repatriated			740,900,000
Foreign Withholding Tax			28,100,000
Income Tax Expense (Benefit) repatriation		167,115,000	(4,164,000)	167,115,000	0
Alternative minimum tax credits			22,400,000
Tax Credit Carryforward, Deferred Tax Asset			71,300,000
Tax Credit Carryforward, Amount			187,700,000
Undistributed earnings of foreign subsidiaries			447,000,000
tax benefit as result of repatriation			8,600,000
Impact of tax holiday on diluted earnings per share			$ 0.50	$ 0.18	$ 0.11
Foreign Income Tax Paid, Net			14,500,000
Debt Instruments, Discount Rate	8.50%		8.50%
Debt Instrument, Interest Rate, Stated Percentage			3.25%
Tax credit carryforward expiration			2015 through 2034
unrecognized tax benefits offset against deferred tax asset		140,600,000	108,100,000	140,600,000
Federal [Member]
Income Taxes [Line Items]
Net operating loss carryforwards			39,700,000
Federal research tax credits			41,300,000
capital loss carryforward			3,000,000,000
State [Member]
Income Taxes [Line Items]
Net operating loss carryforwards			1,600,000,000
Federal research tax credits			2,100,000
capital loss carryforward			3,100,000,000
Foreign [Member]
Income Taxes [Line Items]
Net operating loss carryforwards			$ 22,100,000
Tax credit carryforward expiration			2024
Federal And State [Member]
Income Taxes [Line Items]
Operating Loss Carryforwards, Date			2015 through 2034