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Stockholders' equity (Tables) | 12 Months Ended
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Dec. 31, 2022
Equity [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) | Accumulated other comprehensive loss is as follows:
|  | Total |  | Translation Adjustments |  | Postretirement Plans
Balance at December 31, 2019 |  | $ | (4,088.6) |  |  | $ | (872.9) |  |  | $ | (3,215.7) |
Other comprehensive income before reclassifications |  | 489.4 |  |  | 78.6 |  |  | 410.8 |
Amounts reclassified from accumulated other comprehensive loss |  | (340.3) |  |  | (32.3) |  |  | (308.0) |
Current period other comprehensive income |  | 149.1 |  |  | 46.3 |  |  | 102.8 |
Balance at December 31, 2020 |  | (3,939.5) |  |  | (826.6) |  |  | (3,112.9) |
Other comprehensive income (loss) before reclassifications |  | 58.6 |  |  | (43.6) |  |  | 102.2 |
Amounts reclassified from accumulated other comprehensive loss |  | 616.8 |  |  | 4.0 |  |  | 612.8 |
Current period other comprehensive income (loss) |  | 675.4 |  |  | (39.6) |  |  | 715.0 |
Balance at December 31, 2021 |  | (3,264.1) |  |  | (866.2) |  |  | (2,397.9) |
Other comprehensive income (loss) before reclassifications |  | 38.0 |  |  | (114.1) |  |  | 152.1 |
Amounts reclassified from accumulated other comprehensive loss |  | 150.1 |  |  | 2.9 |  |  | 147.2 |
Current period other comprehensive income (loss) |  | 188.1 |  |  | (111.2) |  |  | 299.3 |
Balance at December 31, 2022 |  | $ | (3,076.0) |  |  | $ | (977.4) |  |  | $ | (2,098.6) |
Schedule of Amounts Reclassified Out of Accumulated Other Comprehensive Income (Loss) | Amounts reclassified out of accumulated other comprehensive loss are as follows:
Year ended December 31, |  | 2022 |  | 2021 |  | 2020
Translation Adjustments: |  |  |  |  |  |
Adjustment for substantial completion of liquidation of foreign subsidiaries(i) |  | $ | 2.9 |  |  | $ | 4.0 |  |  | $ | (32.3) |
Postretirement Plans: |  |  |  |  |  |
Amortization of prior service cost(ii) |  | (5.8) |  |  | (6.2) |  |  | 5.9 |
Amortization of actuarial losses(ii) |  | 159.0 |  |  | 178.9 |  |  | (177.3) |
Settlement losses(ii) |  | — |  |  | 499.4 |  |  | (142.1) |
Total before tax |  | 156.1 |  |  | 676.1 |  |  | (345.8) |
Income tax benefit |  | (6.0) |  |  | (59.3) |  |  | 5.5 |
Total reclassifications for the period |  | $ | 150.1 |  |  | $ | 616.8 |  |  | $ | (340.3) |
(i) Reported in other (expense), net in the consolidated statements of income (loss) (ii) Included in net periodic postretirement cost (see Note 18, “Employee plans”)
Schedule of Changes in Common Stock and Treasury Stock | The following table summarizes the changes in shares of common stock and treasury stock:
|  | Common Stock |  | Treasury Stock
Balance at December 31, 2019 |  | 65.9 |  |  | 3.5 |
Stock-based compensation |  | 0.9 |  |  | 0.3 |
Balance at December 31, 2020 |  | 66.8 |  |  | 3.8 |
Debt exchange |  | 4.6 |  |  | 1.2 |
Stock-based compensation |  | 1.1 |  |  | 0.3 |
Balance at December 31, 2021 |  | 72.5 |  |  | 5.3 |
Stock-based compensation |  | 0.8 |  |  | 0.2 |
Balance at December 31, 2022 |  | 73.3 |  |  | 5.5 |

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- Definition Tabular disclosure of an entity's stock, including par or stated value per share, number and dollar amount of share subscriptions, shares authorized, shares issued, shares outstanding, number and dollar amount of shares held in an employee trust, dividend per share, total dividends, share conversion features, par value plus additional paid in capital, the value of treasury stock and other information necessary to a fair presentation, and EPS information. Stock by class includes common, convertible, and preferred stocks which are not redeemable or redeemable solely at the option of the issuer. Includes preferred stock with redemption features that are solely within the control of the issuer and mandatorily redeemable stock if redemption is required to occur only upon liquidation or termination of the reporting entity. If more than one issue is outstanding, state the title of each issue and the corresponding dollar amount; dollar amount of any shares subscribed but unissued and the deduction of subscriptions receivable there from; number of shares authorized, issued, and outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 45 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=65888546&loc=d3e21300-112643 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 10 -URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21553-112644 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=122040564&loc=d3e177068-122764 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21538-112644 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21521-112644 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21488-112644 Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI https://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21506-112644 Reference 11: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(27)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 12: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21484-112644 Reference 13: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21475-112644 + Details
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