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Income Taxes (Reconciliation of U.S. Federal Tax to Effective Tax Rate) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Effective tax rate reconciliation |  |  |
Statutory U.S. federal tax rate | 21.00% | 21.00% | 21.00%
Increase (decrease) in rate resulting from: |  |  |
State and local income taxes, net of related federal taxes | 4.60% | 7.30% | 3.40%
U.S. tax rate change and other tax law impacts | 60.20% | 2.10% | (1.50%)
Effect of noncontrolling interest | (18.80%) | 2.40% | 0.10%
Derivative instruments and hedging activities | (13.00%) | 0.00% | 0.00%
Income taxes on foreign earnings | (6.80%) | (0.60%) | (1.50%)
Nondeductible compensation | (6.10%) | 4.60% | 1.50%
Release (accrual) of unrecognized tax benefits | 2.70% | 3.90% | (0.10%)
Tax effect of GILTI | 0.00% | 0.40% | 1.40%
Research and development and other tax credits | 0.014 | (0.232) | (0.034)
Equity method investments | (0.10%) | 5.70% | 1.10%
Acquisition related permanent item | 0.00% | 24.00% | 0.00%
Other, net | (3.20%) | (1.20%) | 0.50%
Effective tax rate | 41.90% | 46.40% | 22.50%
COVID-19 Pandemic |  |  |
Increase (decrease) in rate resulting from: |  |  |
U.S. tax rate change and other tax law impacts | $ 14.8 |  |

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