Income Taxes (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Tax Credit Carryforward [Line Items]
Statutory rate	35.00%	35.00%	35.00%
Income tax benefit (expense)	$ 2,458.7	$ 1,237.3	$ 1,161.6
Net impairment on certain tax assets	48.8
Income Taxes (Textual)
Total deferred charges and prepaid taxes	617.7	989.8
Unrecognized tax benefit	64.3	26.9	15.7
Net interest expense	4.8	9.1	$ 3.1
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	$ 16.1	$ 25.2
2017 Tax Act
Tax Credit Carryforward [Line Items]
Statutory rate	21.00%
Income tax benefit (expense)	$ 1,173.6
Accrued income tax liability under the Transition Toll Tax	989.6
Accrued income tax liability under the Transition Toll Tax, current	78.3
Income tax expense (benefit)	184.0
Foreign Tax Authority [Member]
Tax Credit Carryforward [Line Items]
Notice of assessment of corporate withholding tax including penalties and interest	60.0
General Business | Domestic Country
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards	1.4
Tax Credit Carryforward, Amount	1.3
General Business | State and Local Jurisdiction
Tax Credit Carryforward [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	19.3
General Business | Foreign Tax Authority [Member]
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards	2,100.0
Research | State and Local Jurisdiction
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward, Amount	129.7
Prepaid taxes
Tax Credit Carryforward [Line Items]
Net impairment on certain tax assets	142.6
Deferred Tax Asset
Income Taxes (Textual)
Cumulative Effect of New Accounting Principle in Period of Adoption	500.0
Retained Earnings
Income Taxes (Textual)
Cumulative Effect of New Accounting Principle in Period of Adoption	$ 500.0
Earnings in the form of cash and cash equivalents | 2017 Tax Act
Tax Credit Carryforward [Line Items]
Transition Toll Tax repatriation tax rate	15.50%
Other Foreign Earnings | 2017 Tax Act
Tax Credit Carryforward [Line Items]
Transition Toll Tax repatriation tax rate	8.00%