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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 |  |  |

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