Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating Loss Carryforwards [Line Items]
2017 Tax Act provision				$ 1,910.0
2017 Tax Act benefit				$ 3,600.0
2017 Tax Act, deferred taxes related to GILTI			$ 313.3
Domestic and Puerto Rican companies contribution		44.00%	15.00%	16.00%
Unrecognized tax benefits that would impact effective tax rate		$ 1,530.0	$ 1,480.0
Accruals for the payment of interest and penalties		150.8	$ 183.9
Carryforward
Operating Loss Carryforwards [Line Items]
Tax credit carryforward		799.2
Operating loss carryforwards		949.7
Expiration in 6 Years
Operating Loss Carryforwards [Line Items]
Tax credit carryforward		149.3
Expiration in 12 to 18 Years
Operating Loss Carryforwards [Line Items]
Tax credit carryforward		55.6
Designated Unusable | Internal Revenue Service (IRS)
Operating Loss Carryforwards [Line Items]
Tax credit carryforward		86.6
Designated Unusable | Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Tax credit carryforward		114.7
Designated Unusable | State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Tax credit carryforward		393.0
Deferred tax assets related to state net operating losses		116.1
Other state carryforwards		3.6
Expiration within 5 years
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards		181.4
Expiration 5 to 20 Years
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards		345.4
No Expiration
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards		$ 422.9
Tax Years 2013 to 2015
Operating Loss Carryforwards [Line Items]
Decrease in unrecognized tax benefits is reasonably possible	$ 200.0
Payments for income tax settlements	$ 125.0