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PENSIONS AND OTHER POSTRETIREMENT BENEFITS (Tables) | 12 Months Ended
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Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items] |
Annual Costs Related to Retirement Plans | The following table summarizes the annual expense (income) recognized related to the retirement plans:
| (In Millions)
| 2019 |  | 2018 |  | 2017
Defined benefit pension plans | $ | 22.4 |  |  | $ | 12.7 |  |  | $ | 18.0 |
Defined contribution pension plans | 3.4 |  |  | 3.1 |  |  | 2.9 |
OPEB plans | (2.5 | ) |  | (5.9 | ) |  | (6.1 | )
Total | $ | 23.3 |  |  | $ | 9.9 |  |  | $ | 14.8 |
Obligations and Funded Status | The following tables and information provide additional disclosures:
| (In Millions)
| Pension Benefits |  | Other Benefits
Change in benefit obligations: | 2019 |  | 2018 |  | 2019 |  | 2018
Benefit obligations — beginning of year | $ | 905.7 |  |  | $ | 973.1 |  |  | $ | 241.9 |  |  | $ | 265.9 |
Service cost (excluding expenses) | 17.3 |  |  | 18.7 |  |  | 1.7 |  |  | 2.2 |
Interest cost | 34.9 |  |  | 30.3 |  |  | 9.5 |  |  | 8.3 |
Plan amendments | — |  |  | 2.2 |  |  | — |  |  | 12.8 |
Actuarial (gain) loss | 111.8 |  |  | (57.0 | ) |  | 18.9 |  |  | (29.4 | )
Benefits paid | (62.2 | ) |  | (60.7 | ) |  | (25.6 | ) |  | (24.4 | )
Participant contributions | — |  |  | — |  |  | 5.8 |  |  | 5.6 |
Other | 13.6 |  |  | (0.9 | ) |  | 2.3 |  |  | 0.9 |
Benefit obligations — end of year | $ | 1,021.1 |  |  | $ | 905.7 |  |  | $ | 254.5 |  |  | $ | 241.9 |
Change in plan assets: |  |  |  |  |  |  |
Fair value of plan assets — beginning of year | $ | 687.2 |  |  | $ | 749.8 |  |  | $ | 240.2 |  |  | $ | 262.5 |
Actual return on plan assets | 98.1 |  |  | (29.6 | ) |  | 35.1 |  |  | (8.2 | )
Participant contributions | — |  |  | — |  |  | 0.5 |  |  | 0.5 |
Employer contributions | 16.4 |  |  | 27.6 |  |  | 2.5 |  |  | 3.0 |
Benefits paid | (62.2 | ) |  | (60.7 | ) |  | (18.6 | ) |  | (17.6 | )
Other | 9.4 |  |  | 0.1 |  |  | — |  |  | — |
Fair value of plan assets — end of year | $ | 748.9 |  |  | $ | 687.2 |  |  | $ | 259.7 |  |  | $ | 240.2 |
Funded status | $ | (272.2 | ) |  | $ | (218.5 | ) |  | $ | 5.2 |  |  | $ | (1.7 | )
Amounts recognized in Statements of Financial Position: |  |  |  |  |  |  |
Non-current assets | $ | — |  |  | $ | — |  |  | $ | 48.5 |  |  | $ | 32.1 |
Current liabilities | (0.5 | ) |  | (0.1 | ) |  | (3.5 | ) |  | (3.5 | )
Non-current liabilities | (271.7 | ) |  | (218.4 | ) |  | (39.8 | ) |  | (30.3 | )
Total amount recognized | $ | (272.2 | ) |  | $ | (218.5 | ) |  | $ | 5.2 |  |  | $ | (1.7 | )
Amounts recognized in accumulated other comprehensive loss: |  |  |  |  |  |  |
Net actuarial loss | $ | 382.1 |  |  | $ | 330.1 |  |  | $ | 72.6 |  |  | $ | 82.1 |
Prior service cost (credit) | 7.3 |  |  | 8.5 |  |  | (7.9 | ) |  | (9.9 | )
Net amount recognized | $ | 389.4 |  |  | $ | 338.6 |  |  | $ | 64.7 |  |  | $ | 72.2 |
Schedule of Net Funded Status |
| (In Millions)
| 2019
| Pension Plans |  | Other Benefits
| Salaried |  | Hourly |  | SERP |  | Total |  | Salaried |  | Hourly |  | Total
Fair value of plan assets | $ | 293.7 |  |  | $ | 455.2 |  |  | $ | — |  |  | $ | 748.9 |  |  | $ | — |  |  | $ | 259.7 |  |  | $ | 259.7 |
Benefit obligation | (407.2 | ) |  | (607.3 | ) |  | (6.6 | ) |  | (1,021.1 | ) |  | (37.7 | ) |  | (216.8 | ) |  | (254.5 | )
Funded status | $ | (113.5 | ) |  | $ | (152.1 | ) |  | $ | (6.6 | ) |  | $ | (272.2 | ) |  | $ | (37.7 | ) |  | $ | 42.9 |  |  | $ | 5.2 |
| (In Millions)
| 2018
| Pension Plans |  | Other Benefits
| Salaried |  | Hourly |  | Mining |  | SERP |  | Total |  | Salaried |  | Hourly |  | Total
Fair value of plan assets | $ | 249.8 |  |  | $ | 429.4 |  |  | $ | 8.0 |  |  | $ | — |  |  | $ | 687.2 |  |  | $ | — |  |  | $ | 240.2 |  |  | $ | 240.2 |
Benefit obligation | (340.8 | ) |  | (548.9 | ) |  | (10.7 | ) |  | (5.3 | ) |  | (905.7 | ) |  | (32.9 | ) |  | (209.0 | ) |  | (241.9 | )
Funded status | $ | (91.0 | ) |  | $ | (119.5 | ) |  | $ | (2.7 | ) |  | $ | (5.3 | ) |  | $ | (218.5 | ) |  | $ | (32.9 | ) |  | $ | 31.2 |  |  | $ | (1.7 | )
Components Of Net Periodic Benefit Cost | Components of Net Periodic Benefit Cost
| (In Millions)
| Pension Benefits |  | Other Benefits
| 2019 |  | 2018 |  | 2017 |  | 2019 |  | 2018 |  | 2017
Service cost | $ | 17.3 |  |  | $ | 18.7 |  |  | $ | 17.1 |  |  | $ | 1.7 |  |  | $ | 2.2 |  |  | $ | 1.8 |
Interest cost | 34.9 |  |  | 30.3 |  |  | 30.5 |  |  | 9.5 |  |  | 8.3 |  |  | 8.3 |
Expected return on plan assets | (54.6 | ) |  | (60.0 | ) |  | (54.5 | ) |  | (16.8 | ) |  | (18.4 | ) |  | (17.7 | )
Amortization: |  |  |  |  |  |  |  |  |  |  |
Prior service costs (credits) | 1.2 |  |  | 2.2 |  |  | 2.6 |  |  | (2.0 | ) |  | (3.0 | ) |  | (3.0 | )
Net actuarial loss | 23.5 |  |  | 21.2 |  |  | 22.3 |  |  | 5.1 |  |  | 5.0 |  |  | 4.5 |
Curtailments | 0.1 |  |  | 0.3 |  |  | — |  |  | — |  |  | — |  |  | — |
Net periodic benefit cost (credit) | $ | 22.4 |  |  | $ | 12.7 |  |  | $ | 18.0 |  |  | $ | (2.5 | ) |  | $ | (5.9 | ) |  | $ | (6.1 | )
Components of Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
| (In Millions)
| Pension Benefits |  | Other Benefits
| 2019 |  | 2018 |  | 2019 |  | 2018
Discount rates | $ | 105.8 |  |  | $ | (75.7 | ) |  | $ | 25.5 |  |  | $ | (19.0 | )
Demographic losses | 12.3 |  |  | 21.7 |  |  | 3.6 |  |  | 2.3 |
Mortality | (6.3 | ) |  | (3.0 | ) |  | (3.9 | ) |  | (0.8 | )
Per capita claims | — |  |  | — |  |  | (9.4 | ) |  | (11.9 | )
Other | — |  |  | — |  |  | 3.1 |  |  | — |
Actuarial (gain) loss on benefit obligation | 111.8 |  |  | (57.0 | ) |  | 18.9 |  |  | (29.4 | )
Actual returns on assets (over) under estimate | (43.5 | ) |  | 89.6 |  |  | (18.3 | ) |  | 26.6 |
Amortization of net actuarial loss | (23.5 | ) |  | (21.2 | ) |  | (5.1 | ) |  | (5.0 | )
Amortization of prior service credits (costs) | (1.2 | ) |  | (2.2 | ) |  | 2.0 |  |  | 3.0 |
Current year prior service costs | — |  |  | 2.2 |  |  | — |  |  | 12.8 |
Other | 7.2 |  |  | (0.3 | ) |  | (5.0 | ) |  | 1.5 |
Total recognized in accumulated other comprehensive loss (income) | $ | 50.8 |  |  | $ | 11.1 |  |  | $ | (7.5 | ) |  | $ | 9.5 |
Weighted-Average Assumptions Used to Determine Benefit Obligations | The following represents weighted-average assumptions used to determine benefit obligations:
| Pension Benefits |  | Other Benefits
| December 31, |  | December 31,
| 2019 |  | 2018 |  | 2019 |  | 2018
Discount rate: |  |  |  |  |  |  |  |  |  |  |
Iron Hourly Pension Plan | 3.34 | % |  | 4.31 | % |  | N/A | % |  | N/A | %
Salaried Pension Plan | 3.18 |  |  | 4.21 |  |  | N/A |  |  | N/A |
Ore Mining Pension Plan | N/A |  |  | 4.33 |  |  | N/A |  |  | N/A |
Supplemental Executive Retirement Plan | 3.05 |  |  | 4.22 |  |  | N/A |  |  | N/A |
Hourly OPEB Plan | N/A |  |  | N/A |  |  | 3.28 |  |  | 4.29 |
Salaried OPEB Plan | N/A |  |  | N/A |  |  | 3.29 |  |  | 4.27 |
Interest crediting rate | 6.00 |  |  | 6.00 |  |  | N/A |  |  | N/A |
Salaried rate of compensation increase | 3.00 |  |  | 3.00 |  |  | 3.00 |  |  | 3.00 |
Hourly rate of compensation increase | 2.00 |  |  | 2.00 |  |  | N/A |  |  | N/A |
Weighted-Average Assumptions Used To Determine Net Benefit Costs | The following represents weighted-average assumptions used to determine net benefit cost:
| Pension Benefits |  | Other Benefits
| December 31, |  | December 31,
| 2019 |  | 2018 |  | 2017 |  | 2019 |  | 2018 |  | 2017
Obligation Discount Rate: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Iron Hourly Pension Plan | 4.31 | % |  | 3.61 | % |  | 4.02 | % |  | N/A | % |  | N/A | % |  | N/A | %
Salaried Pension Plan | 4.22 |  |  | 3.52 |  |  | 3.91 |  |  | N/A |  |  | N/A |  |  | N/A |
Ore Mining Pension Plan | N/A |  |  | 3.61 |  |  | 4.04 |  |  | N/A |  |  | N/A |  |  | N/A |
Supplemental Executive Retirement Plan | 4.21 |  |  | 3.54 |  |  | 3.90 |  |  | N/A |  |  | N/A |  |  | N/A |
Hourly OPEB Plan | N/A |  |  | N/A |  |  | N/A |  |  | 4.29 |  |  | 3.60 |  |  | 4.03 |
Salaried OPEB Plan | N/A |  |  | N/A |  |  | N/A |  |  | 4.28 |  |  | 3.57 |  |  | 3.98 |
Service Cost Discount Rate: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Iron Hourly Pension Plan | 4.49 |  |  | 3.76 |  |  | 4.30 |  |  | N/A |  |  | N/A |  |  | N/A |
Salaried Pension Plan | 4.23 |  |  | 3.53 |  |  | 3.93 |  |  | N/A |  |  | N/A |  |  | N/A |
Ore Mining Pension Plan | N/A |  |  | 3.75 |  |  | 4.27 |  |  | N/A |  |  | N/A |  |  | N/A |
Supplemental Executive Retirement Plan | 4.11 |  |  | 3.43 |  |  | 3.69 |  |  | N/A |  |  | N/A |  |  | N/A |
Hourly OPEB Plan | N/A |  |  | N/A |  |  | N/A |  |  | 4.48 |  |  | 3.73 |  |  | 4.23 |
Salaried OPEB Plan | N/A |  |  | N/A |  |  | N/A |  |  | 4.54 |  |  | 3.76 |  |  | 4.30 |
Interest Cost Discount Rate: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Iron Hourly Pension Plan | 3.96 |  |  | 3.21 |  |  | 3.38 |  |  | N/A |  |  | N/A |  |  | N/A |
Salaried Pension Plan | 3.85 |  |  | 3.08 |  |  | 3.21 |  |  | N/A |  |  | N/A |  |  | N/A |
Ore Mining Pension Plan | N/A |  |  | 3.22 |  |  | 3.41 |  |  | N/A |  |  | N/A |  |  | N/A |
Supplemental Executive Retirement Plan | 3.89 |  |  | 3.16 |  |  | 3.36 |  |  | N/A |  |  | N/A |  |  | N/A |
Hourly OPEB Plan | N/A |  |  | N/A |  |  | N/A |  |  | 3.95 |  |  | 3.10 |  |  | 3.24 |
Salaried OPEB Plan | N/A |  |  | N/A |  |  | N/A |  |  | 3.91 |  |  | 3.15 |  |  | 3.28 |
Interest crediting rate | 6.00 |  |  | 6.00 |  |  | 6.00 |  |  | N/A |  |  | N/A |  |  | N/A |
Expected return on plan assets | 8.25 |  |  | 8.25 |  |  | 8.25 |  |  | 7.00 |  |  | 7.00 |  |  | 7.00 |
Salaried rate of compensation increase | 3.00 |  |  | 3.00 |  |  | 3.00 |  |  | 3.00 |  |  | 3.00 |  |  | 3.00 |
Hourly rate of compensation increase | 2.00 |  |  | 2.00 |  |  | 2.00 |  |  | N/A |  |  | N/A |  |  | N/A |
Assumed Health Care Cost Trend Rates | The following represents assumed health care cost trend rates:
| December 31,
| 2019 |  | 2018
Health care cost trend rate assumed for next year | 6.50 | % |  | 6.75 | %
Ultimate health care cost trend rate | 5.00 |  |  | 5.00 |
Year that the ultimate rate is reached | 2026 |  |  | 2026 |
Plan Assets and Asset Allocation | The following table reflects the actual asset allocations for pension and VEBA plan assets as of December 31, 2019 and 2018, as well as the 2020 weighted average target asset allocations. Equity investments include securities in large-cap, mid-cap and small-cap companies located in the U.S. and worldwide. Fixed income investments primarily include corporate bonds and government debt securities.
|  | Pension Assets |  | VEBA Assets
Asset Category |  | 2020 Target Allocation |  | Percentage of Plan Assets at December 31, |  | 2020 Target Allocation |  | Percentage of Plan Assets at December 31,
2019 |  | 2018 |  | 2019 |  | 2018
Equity securities |  | 45.0 | % |  | 44.0 | % |  | 38.9 | % |  | 8.0 | % |  | 7.2 | % |  | 8.1 | %
Fixed income |  | 28.0 | % |  | 26.1 | % |  | 26.0 | % |  | 80.0 | % |  | 79.8 | % |  | 77.0 | %
Hedge funds |  | 5.0 | % |  | 5.4 | % |  | 5.4 | % |  | 4.0 | % |  | 4.8 | % |  | 4.7 | %
Private equity |  | 7.0 | % |  | 6.6 | % |  | 6.2 | % |  | 3.0 | % |  | 0.7 | % |  | 1.2 | %
Structured credit |  | 7.5 | % |  | 7.0 | % |  | 11.4 | % |  | 2.0 | % |  | 2.1 | % |  | 3.5 | %
Real estate |  | 7.5 | % |  | 9.4 | % |  | 10.3 | % |  | 3.0 | % |  | 5.4 | % |  | 5.4 | %
Cash |  | — | % |  | 1.5 | % |  | 1.8 | % |  | — | % |  | — | % |  | 0.1 | %
Total |  | 100.0 | % |  | 100.0 | % |  | 100.0 | % |  | 100.0 | % |  | 100.0 | % |  | 100.0 | %
Defined Benefit Plan, Plan Assets, Category [Table Text Block] | The fair value of our pension plan assets by asset category is as follows:
|  | (In Millions)
|  | December 31, 2019
Asset Category |  | Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3) |  | Total
Equity securities: |  |  |  |  |  |  |  |
U.S. large-cap |  | $ | 139.1 |  |  | $ | — |  |  | $ | — |  |  | $ | 139.1 |
U.S. small/mid-cap |  | 29.3 |  |  | — |  |  | — |  |  | 29.3 |
International |  | 161.4 |  |  | — |  |  | — |  |  | 161.4 |
Fixed income |  | 173.0 |  |  | 22.3 |  |  | — |  |  | 195.3 |
Hedge funds |  | — |  |  | — |  |  | 40.2 |  |  | 40.2 |
Private equity |  | — |  |  | — |  |  | 49.5 |  |  | 49.5 |
Structured credit |  | — |  |  | — |  |  | 52.3 |  |  | 52.3 |
Real estate |  | — |  |  | — |  |  | 70.4 |  |  | 70.4 |
Cash |  | 11.4 |  |  | — |  |  | — |  |  | 11.4 |
Total |  | $ | 514.2 |  |  | $ | 22.3 |  |  | $ | 212.4 |  |  | $ | 748.9 |
|  | (In Millions)
|  | December 31, 2018
Asset Category |  | Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3) |  | Total
Equity securities: |  |  |  |  |  |  |  |
U.S. large-cap |  | $ | 112.6 |  |  | $ | — |  |  | $ | — |  |  | $ | 112.6 |
U.S. small/mid-cap |  | 22.5 |  |  | — |  |  | — |  |  | 22.5 |
International |  | 132.0 |  |  | — |  |  | — |  |  | 132.0 |
Fixed income |  | 151.1 |  |  | 27.4 |  |  | — |  |  | 178.5 |
Hedge funds |  | — |  |  | — |  |  | 37.2 |  |  | 37.2 |
Private equity |  | — |  |  | — |  |  | 42.6 |  |  | 42.6 |
Structured credit |  | — |  |  | — |  |  | 78.8 |  |  | 78.8 |
Real estate |  | — |  |  | — |  |  | 70.5 |  |  | 70.5 |
Cash |  | 12.5 |  |  | — |  |  | — |  |  | 12.5 |
Total |  | $ | 430.7 |  |  | $ | 27.4 |  |  | $ | 229.1 |  |  | $ | 687.2 |
Effect of Fair Value Measurements Using Significant Unobservable Inputs on Changes in Plan Assets | The following represents the fair value measurements of changes in plan assets using significant unobservable inputs (Level 3):
| (In Millions)
| Year Ended December 31, 2019
| Hedge Funds |  | Private Equity Funds |  | Structured Credit Fund |  | Real Estate |  | Total
Beginning balance — January 1, 2019 | $ | 37.2 |  |  | $ | 42.6 |  |  | $ | 78.8 |  |  | $ | 70.5 |  |  | $ | 229.1 |
Actual return on plan assets: |  |  |  |  |  |  |  |  |
Relating to assets still held at the reporting date | 3.4 |  |  | (1.0 | ) |  | 0.5 |  |  | (4.2 | ) |  | (1.3 | )
Relating to assets sold during the period | — |  |  | 1.2 |  |  | 0.8 |  |  | 28.6 |  |  | 30.6 |
Purchases | — |  |  | 16.5 |  |  | — |  |  | — |  |  | 16.5 |
Sales | — |  |  | (9.3 | ) |  | (26.8 | ) |  | (23.8 | ) |  | (59.9 | )
Other | (0.4 | ) |  | (0.5 | ) |  | (1.0 | ) |  | (0.7 | ) |  | (2.6 | )
Ending balance — December 31, 2019 | $ | 40.2 |  |  | $ | 49.5 |  |  | $ | 52.3 |  |  | $ | 70.4 |  |  | $ | 212.4 |
| (In Millions)
| Year Ended December 31, 2018
| Hedge Funds |  | Private Equity Funds |  | Structured Credit Fund |  | Real Estate |  | Total
Beginning balance — January 1, 2018 | $ | 37.4 |  |  | $ | 39.8 |  |  | $ | 72.9 |  |  | $ | 65.5 |  |  | $ | 215.6 |
Actual return on plan assets: |  |  |  |  |  |  |  |  |
Relating to assets still held at the reporting date | (0.2 | ) |  | 1.4 |  |  | 5.9 |  |  | 5.4 |  |  | 12.5 |
Relating to assets sold during the period | — |  |  | 4.0 |  |  | — |  |  | — |  |  | 4.0 |
Purchases | — |  |  | 5.2 |  |  | — |  |  | — |  |  | 5.2 |
Sales | — |  |  | (7.8 | ) |  | — |  |  | (0.4 | ) |  | (8.2 | )
Ending balance — December 31, 2018 | $ | 37.2 |  |  | $ | 42.6 |  |  | $ | 78.8 |  |  | $ | 70.5 |  |  | $ | 229.1 |
Schedule Of Annual Contributions |
|  | (In Millions)
|  | Pension Benefits |  | Other Benefits
Company Contributions |  | VEBA |  | Direct Payments |  | Total
2018 |  | $ | 27.6 |  |  | $ | — |  |  | $ | 3.8 |  |  | $ | 3.8 |
2019 |  | 16.4 |  |  | — |  |  | 3.7 |  |  | 3.7 |
2020 (Expected)1 |  | 20.2 |  |  | — |  |  | 3.5 |  |  | 3.5 |
1 Pursuant to the bargaining agreement, benefits can be paid from VEBA trusts that are at least 70% funded (all VEBA trusts are over 70% funded at December 31, 2019). Funding obligations have been suspended as UTAC's, Tilden's and Empire's share of the value of their respective trust assets have reached 90% of their obligation.
Estimated Net Periodic Benefit Cost | Estimated Cost for 2020 For 2020, we estimate net periodic benefit cost (credit) as follows:
| (In Millions)
Defined benefit pension plans | $ | 16.7 |
OPEB plans | (8.7 | )
Total | $ | 8.0 |
Estimated Future Benefit Payments | Estimated Future Benefit Payments
| (In Millions)
| Pension Benefits |  | Other Benefits
Gross Company Benefits |  | Less Medicare Subsidy |  | Net Benefit Payments
2020 | $ | 73.6 |  |  | $ | 17.2 |  |  | $ | (0.7 | ) |  | $ | 16.5 |
2021 | 71.1 |  |  | 16.6 |  |  | (0.8 | ) |  | 15.8 |
2022 | 70.4 |  |  | 16.3 |  |  | (0.8 | ) |  | 15.5 |
2023 | 71.2 |  |  | 16.3 |  |  | (0.8 | ) |  | 15.5 |
2024 | 66.9 |  |  | 16.1 |  |  | (0.9 | ) |  | 15.2 |
2025-2029 | 318.2 |  |  | 77.3 |  |  | (4.6 | ) |  | 72.7 |
Veba Trust [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Defined Benefit Plan, Plan Assets, Category [Table Text Block] | The fair value of our other benefit plan assets by asset category is as follows:
|  | (In Millions)
|  | December 31, 2019
Asset Category |  | Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3) |  | Total
Equity securities: |  |  |  |  |  |  |  |
U.S. large-cap |  | $ | 9.3 |  |  | $ | — |  |  | $ | — |  |  | $ | 9.3 |
U.S. small/mid-cap |  | 2.3 |  |  | — |  |  | — |  |  | 2.3 |
International |  | 7.0 |  |  | — |  |  | — |  |  | 7.0 |
Fixed income |  | 166.4 |  |  | 40.9 |  |  | — |  |  | 207.3 |
Hedge funds |  | — |  |  | — |  |  | 12.4 |  |  | 12.4 |
Private equity |  | — |  |  | — |  |  | 1.7 |  |  | 1.7 |
Structured credit |  | — |  |  | — |  |  | 5.5 |  |  | 5.5 |
Real estate |  | — |  |  | — |  |  | 14.0 |  |  | 14.0 |
Cash |  | 0.2 |  |  | — |  |  | — |  |  | 0.2 |
Total |  | $ | 185.2 |  |  | $ | 40.9 |  |  | $ | 33.6 |  |  | $ | 259.7 |
|  | (In Millions)
|  | December 31, 2018
Asset Category |  | Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3) |  | Total
Equity securities: |  |  |  |  |  |  |  |
U.S. large-cap |  | $ | 9.7 |  |  | $ | — |  |  | $ | — |  |  | $ | 9.7 |
U.S. small/mid-cap |  | 2.4 |  |  | — |  |  | — |  |  | 2.4 |
International |  | 7.3 |  |  | — |  |  | — |  |  | 7.3 |
Fixed income |  | 146.8 |  |  | 37.8 |  |  | — |  |  | 184.6 |
Hedge funds |  | — |  |  | — |  |  | 11.4 |  |  | 11.4 |
Private equity |  | — |  |  | — |  |  | 3.0 |  |  | 3.0 |
Structured credit |  | — |  |  | — |  |  | 8.5 |  |  | 8.5 |
Real estate |  | — |  |  | — |  |  | 13.1 |  |  | 13.1 |
Cash |  | 0.2 |  |  | — |  |  | — |  |  | 0.2 |
Total |  | $ | 166.4 |  |  | $ | 37.8 |  |  | $ | 36.0 |  |  | $ | 240.2 |
Effect of Fair Value Measurements Using Significant Unobservable Inputs on Changes in Plan Assets | The following represents the effect of fair value measurements using significant unobservable inputs (Level 3) on changes in plan assets:
| (In Millions)
| Year Ended December 31, 2019
| Hedge Funds |  | Private Equity Funds |  | Structured Credit Fund |  | Real Estate |  | Total
Beginning balance — January 1, 2019 | $ | 11.4 |  |  | $ | 3.0 |  |  | $ | 8.5 |  |  | $ | 13.1 |  |  | $ | 36.0 |
Actual return on plan assets: |  |  |  |  |  |  |  |  |
Relating to assets still held at the reporting date | 1.0 |  |  | (0.6 | ) |  | 0.1 |  |  | 0.9 |  |  | 1.4 |
Relating to assets sold during the period | — |  |  | — |  |  | 0.1 |  |  | — |  |  | 0.1 |
Purchases | — |  |  | — |  |  | — |  |  | — |  |  | — |
Sales | — |  |  | (0.7 | ) |  | (3.2 | ) |  | — |  |  | (3.9 | )
Ending balance — December 31, 2019 | $ | 12.4 |  |  | $ | 1.7 |  |  | $ | 5.5 |  |  | $ | 14.0 |  |  | $ | 33.6 |
| (In Millions)
| Year Ended December 31, 2018
| Hedge Funds |  | Private Equity Funds |  | Structured Credit Fund |  | Real Estate |  | Total
Beginning balance — January 1, 2018 | $ | 11.4 |  |  | $ | 3.9 |  |  | $ | 7.9 |  |  | $ | 12.0 |  |  | $ | 35.2 |
Actual return on plan assets: |  |  |  |  |  |  |  |  |
Relating to assets still held at the reporting date | — |  |  | (0.1 | ) |  | 0.6 |  |  | 1.1 |  |  | 1.6 |
Relating to assets sold during the period | — |  |  | 0.3 |  |  | — |  |  | — |  |  | 0.3 |
Purchases | — |  |  | — |  |  | — |  |  | — |  |  | — |
Sales | — |  |  | (1.1 | ) |  | — |  |  | — |  |  | (1.1 | )
Ending balance — December 31, 2018 | $ | 11.4 |  |  | $ | 3.0 |  |  | $ | 8.5 |  |  | $ | 13.1 |  |  | $ | 36.0 |

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