Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating Loss Carryforwards [Line Items]
2017 Tax Act, deferred taxes related to GILTI				$ 313.3
Domestic and Puerto Rican companies contribution		39.00%	44.00%	15.00%
Long-term income taxes payable, estimated timing of future cash outflows not possible		$ 1,690.0
Unrecognized tax benefits that would impact effective tax rate		1,670.0	$ 1,530.0
Accruals for the payment of interest and penalties		196.7	150.8
Carryforward
Operating Loss Carryforwards [Line Items]
Tax credit carryforward		887.3
Operating loss carryforwards		1,520.0
Expiration in 6 Years
Operating Loss Carryforwards [Line Items]
Tax credit carryforward		148.8
Expiration in 12 to 18 Years
Operating Loss Carryforwards [Line Items]
Tax credit carryforward		16.1
Designated Unusable | Internal Revenue Service (IRS)
Operating Loss Carryforwards [Line Items]
Tax credit carryforward		84.8
Designated Unusable | Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Tax credit carryforward		121.9
Designated Unusable | State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Tax credit carryforward		515.7
Deferred tax assets related to state net operating losses			$ 175.6
Expiration within 5 years
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards		162.6
Expiration 5 to 20 Years
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards		781.7
No Expiration
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards		$ 576.3
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