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INCOME TAXES - SUMMARY (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
INCOME TAXES |  |  |
Income taxes - Discrete adjustments related to the Tax Act (1) |  |  | $ (2.9)
Current: |  |  |
Federal | $ 181.2 |  | 0.2
State | 35.6 | $ 8.7 | 3.2
Foreign | 2.5 | 1.4 | 1.3
Discrete adjustments related to the Tax Act |  |  | (2.9)
Total | 219.3 | 10.1 | 1.8
Deferred: |  |  |
Deferred tax expense | 24.6 | 55.8 | 23.3
Total income taxes | $ 243.9 | $ 65.9 | $ 25.1
Difference of Income tax expense from amounts computed by applying the statutory federal rate to income from continuing operations before income taxes |  |  |
Computed federal income tax expense (as a percent) | 21.00% | 21.00% | 21.00%
State income tax (as a percent) | 3.10% | 3.50% | 4.10%
Foreign-derived intangible income (FDII) (as a percent) | (2.50%) |  |
Valuation allowance (as a percent) | (0.30%) | (0.20%) | (0.30%)
Foreign taxes (as a percent) | 0.20% | 0.60% | 1.20%
Remeasurement and discrete adjustments related to Tax Act (as a percent) |  |  | (2.70%)
Share-based payments (as a percent) | (0.20%) | (0.50%) | (0.10%)
Other-net (as a percent) | (0.50%) | 1.00% | 0.10%
Effective income tax rate , Percent, Total | 20.80% | 25.40% | 23.30%
Valuation allowance related to foreign subsidiary losses | $ 4.7 | $ 0.6 | $ 0.9
Valuation allowances | 5.3 | 10.0 |
Deferred tax assets: |  |  |
Operating lease liabilities | 111.7 | 63.5 |
Multi-employer withdrawal liabilities | 13.8 | 15.6 |
Pension and post-retirement plans | 11.1 | 21.7 |
Deferred compensation | 10.4 | 8.2 |
Insurance reserves | 6.0 | 5.3 |
State net operating losses | 5.4 | 7.5 |
Other | 17.8 | 15.7 |
Total deferred tax assets | 176.2 | 137.5 |
Valuation allowance | (5.3) | (10.0) |
Total Deferred tax assets, net of valuation allowance | 170.9 | 127.5 |
Deferred tax liabilities: |  |  |
Basis differences for property and equipment | 423.5 | 372.4 |
Operating lease right of use assets | 109.3 | 61.5 |
Intangibles | 41.3 | 40.5 |
Investment in SSAT | 12.4 | 7.4 |
Capital Construction Fund | 1.3 | 6.7 |
Lease financing |  | 22.0 |
Other | 6.0 | 6.6 |
Total deferred tax liabilities | 593.8 | 517.1 |
Deferred tax liability, net , Total | $ 422.9 | $ 389.6 |

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