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RETIREMENT PLANS - Information Related to Pension and Postretirement Plans (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Projected Benefit Obligation |  |  |
Recorded benefit obligations | $ 87.0 | $ 86.0 |
Settlement expense |  | $ 50.6 | $ 37.2
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Settlement Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Other Nonrecurring (Income) Expense | Other Nonrecurring (Income) Expense |
Amounts recognized in Consolidated Balance Sheet: |  |  |
Other assets | $ 118.4 | $ 118.4 |
Postretirement health care and pension benefits | (651.7) | (670.3) |
Amounts recognized in Accumulated Other Comprehensive Loss (Income): |  |  |
Accumulated other comprehensive loss (income), net of tax | 534.7 | 467.4 |
Change in Accumulated Other Comprehensive Loss (Income): |  |  |
Other comprehensive loss (income) | 55.1 | (130.3) | (289.7)
Aggregate projected benefit obligation, accumulated benefit obligation and fair value of plan assets for pension plans with accumulated benefit obligations in excess of plan assets: |  |  |
Aggregate projected benefit obligation | 2,428.8 | 2,392.1 |
Accumulated benefit obligation | 2,392.4 | 2,355.8 |
Fair value of plan assets | 1,868.9 | 1,828.1 |
U.S. Pension. | Pension |  |  |
Defined Benefit Plan Disclosure |  |  |
Accumulated Benefit Obligation, end of year | 1,859.5 | 1,799.0 |
Projected Benefit Obligation |  |  |
Projected benefit obligation, beginning of year | 1,799.0 | 2,462.7 |
Service cost | 40.9 | 40.8 |
Interest cost | 88.1 | 65.3 |
Actuarial (gain) loss | 90.2 | (479.8) |
Benefits paid | (158.7) | (290.0) |
Projected benefit obligation, end of year | 1,859.5 | 1,799.0 | 2,462.7
Plan Assets |  |  |
Fair value of plan assets, beginning of year | 1,668.5 | 2,376.8 |
Actual returns on plan assets | 149.1 | (430.3) |
Company contributions | 60.8 | 12.0 |
Benefits paid | (158.7) | (290.0) |
Fair value of plan assets, end of year | 1,719.7 | 1,668.5 | 2,376.8
Funded Status, end of year | (139.8) | (130.5) |
Amounts recognized in Consolidated Balance Sheet: |  |  |
Other current liabilities | (9.2) | (9.2) |
Postretirement health care and pension benefits | (130.6) | (121.3) |
Net liability | (139.8) | (130.5) |
Amounts recognized in Accumulated Other Comprehensive Loss (Income): |  |  |
Unrecognized net actuarial loss (gain) | 495.2 | 411.9 |
Unrecognized net prior service costs (benefits) | (16.7) | (21.2) |
Tax (benefit) expense | (122.8) | (100.8) |
Accumulated other comprehensive loss (income), net of tax | 355.7 | 289.9 |
Change in Accumulated Other Comprehensive Loss (Income): |  |  |
Amortization of net actuarial gain (loss) | (0.2) | (30.2) |
Amortization of prior service credits | 4.5 | 4.5 |
Current period net actuarial loss (gain) | 83.5 | 97.0 |
Curtailments and settlements |  | (51.6) |
Tax (benefit) expense | (22.0) | (5.5) |
Other comprehensive loss (income) | 65.8 | 14.2 |
Estimated amounts in accumulated other comprehensive loss expected to be reclassified to net period cost during 2021 |  |  |
Net actuarial loss (gain) | 6.1 |  |
Net prior service costs (benefits) | (4.6) |  |
Total | 1.5 |  |
U.S. Pension. | U.S. Postretirement Benefits |  |  |
Defined Benefit Plan Disclosure |  |  |
Accumulated Benefit Obligation, end of year | 112.0 | 115.5 |
Projected Benefit Obligation |  |  |
Projected benefit obligation, beginning of year | 115.5 | 155.4 |
Service cost | 0.4 | 0.8 | 31.4
Interest cost | 5.6 | 3.3 | 17.3
Participant contributions | 3.8 | 3.7 |
Actuarial (gain) loss | (0.1) | (33.7) |
Benefits paid | (13.2) | (14.0) |
Projected benefit obligation, end of year | 112.0 | 115.5 | 155.4
Plan Assets |  |  |
Fair value of plan assets, beginning of year | 3.2 | 5.2 |
Actual returns on plan assets | 0.2 | (0.8) |
Company contributions | 12.2 | 12.8 |
Benefits paid | (13.2) | (14.0) |
Fair value of plan assets, end of year | 2.4 | 3.2 | 5.2
Funded Status, end of year | (109.6) | (112.3) |
Amounts recognized in Consolidated Balance Sheet: |  |  |
Other current liabilities | (8.7) | (7.6) |
Postretirement health care and pension benefits | (100.9) | (104.7) |
Net liability | (109.6) | (112.3) |
Amounts recognized in Accumulated Other Comprehensive Loss (Income): |  |  |
Unrecognized net actuarial loss (gain) | (40.8) | (43.6) |
Tax (benefit) expense | 6.2 | 7.7 |
Accumulated other comprehensive loss (income), net of tax | (34.6) | (35.9) |
Change in Accumulated Other Comprehensive Loss (Income): |  |  |
Amortization of net actuarial gain (loss) | 3.1 | 0.6 |
Current period net actuarial loss (gain) | (0.3) | (32.5) |
Tax (benefit) expense | (1.5) | 6.5 |
Other comprehensive loss (income) | 1.3 | (25.4) |
Estimated amounts in accumulated other comprehensive loss expected to be reclassified to net period cost during 2021 |  |  |
Net actuarial loss (gain) | (3.2) |  |
Total | (3.2) |  |
International Pension | Pension |  |  |
Defined Benefit Plan Disclosure |  |  |
Accumulated Benefit Obligation, end of year | 1,125.8 | 1,171.1 |
Projected Benefit Obligation |  |  |
Projected benefit obligation, beginning of year | 1,221.9 | 1,779.7 |
Service cost | 21.7 | 28.4 |
Interest cost | 45.9 | 22.0 |
Participant contributions | 2.8 | 3.0 |
Plan amendments | (1.5) |  |
Actuarial (gain) loss | (101.0) | (436.8) |
Assumed through acquisitions |  | 15.1 |
Other events | 2.9 |  |
Benefits paid | (69.8) | (54.3) |
Foreign currency translation | 51.1 | (135.2) |
Projected benefit obligation, end of year | 1,174.0 | 1,221.9 | 1,779.7
Plan Assets |  |  |
Fair value of plan assets, beginning of year | 905.1 | 1,219.9 |
Actual returns on plan assets | (44.0) | (218.3) |
Company contributions | 35.4 | 38.3 |
Participant contributions | 2.8 | 3.0 |
Acquired through acquisitions | 2.9 | 15.1 |
Benefits paid | (67.6) | (54.3) |
Foreign currency translation | 36.6 | (98.6) |
Fair value of plan assets, end of year | 871.2 | 905.1 | $ 1,219.9
Funded Status, end of year | (302.8) | (316.8) |
Amounts recognized in Consolidated Balance Sheet: |  |  |
Other assets | 118.4 | 118.6 |
Other current liabilities | (33.0) | (28.6) |
Postretirement health care and pension benefits | (388.2) | (406.8) |
Net liability | (302.8) | (316.8) |
Amounts recognized in Accumulated Other Comprehensive Loss (Income): |  |  |
Unrecognized net actuarial loss (gain) | 278.5 | 279.7 |
Unrecognized net prior service costs (benefits) | (0.4) | 0.3 |
Tax (benefit) expense | (64.4) | (66.5) |
Accumulated other comprehensive loss (income), net of tax | 213.7 | 213.5 |
Change in Accumulated Other Comprehensive Loss (Income): |  |  |
Amortization of net actuarial gain (loss) | (14.8) | (22.7) |
Amortization of prior service credits | 0.5 | 0.1 |
Current period net actuarial loss (gain) | (1.0) | (147.8) |
Current period prior service costs | (1.5) |  |
Curtailments and settlements | 2.7 |  |
Tax (benefit) expense | 2.1 | 51.3 |
Foreign currency translation | 12.2 | (35.1) |
Other comprehensive loss (income) | 0.2 | $ (154.2) |
Estimated amounts in accumulated other comprehensive loss expected to be reclassified to net period cost during 2021 |  |  |
Net actuarial loss (gain) | 10.0 |  |
Net prior service costs (benefits) | (0.6) |  |
Total | $ 9.4 |  |

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- Definition Amount, after tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -Publisher FASB -URI https://asc.fasb.org//1943274/2147482790/220-10-45-14A Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 10A -Subparagraph (i-k) -SubTopic 10 -Topic 220 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482790/220-10-45-10A Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (j) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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- Definition Amount, before tax, of accumulated other comprehensive (income) loss for cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -Publisher FASB -URI https://asc.fasb.org//1943274/2147482790/220-10-45-14A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (j) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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