Statements of Consolidated Changes in Equity - USD ($) $ in Millions |
Total |
Stelco Holdings Inc |
Common Stock |
Common Stock
Stelco Holdings Inc
|
CapitalÌýin Excess of ParÌýValue of Shares |
CapitalÌýin Excess of ParÌýValue of Shares
Stelco Holdings Inc
|
Retained Earnings (Deficit) |
Common Shares in Treasury |
Common Shares in Treasury
Stelco Holdings Inc
|
AOCI (Loss) |
Non- controlling Interests |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Balance, beginning of period (in shares) at Dec. 31, 2021 | Ìý | Ìý | 500,100,000 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Balance, beginning of period at Dec. 31, 2021 | $ 5,774 | Ìý | $ 63 | Ìý | $ 4,892 | Ìý | $ (1) | $ (82) | Ìý | $ 618 | $ 284 |
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Comprehensive income (loss) | 2,588 | Ìý | Ìý | Ìý | Ìý | Ìý | 1,335 | Ìý | Ìý | 1,212 | 41 |
| Stock and other incentive plans (in shares) | Ìý | Ìý | 1,500,000 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Stock and other incentive plans, APIC | Ìý | Ìý | Ìý | Ìý | 7 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Stock and other incentive plans | 19 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 12 | Ìý | Ìý | Ìý |
| 1.500% 2025 Convertible Senior Notes redemption (in shares) | Ìý | Ìý | 24,200,000 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Stock Issued During Period, Value, Conversion of Convertible Securities, Net of Adjustments | (25) | Ìý | Ìý | Ìý | (28) | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Stock Issued During Period, Value, Conversion of Convertible Securities | Ìý | Ìý | $ 3 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Common stock repurchases (in shares) | Ìý | Ìý | (12,500,000) | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Common stock repurchases, net of excise tax | (240) | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (240) | Ìý | Ìý | Ìý |
| Net distributions to noncontrolling interests | (74) | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (74) |
| Balance, end of period (in shares) at Dec. 31, 2022 | Ìý | Ìý | 513,300,000 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Balance, end of period at Dec. 31, 2022 | 8,042 | Ìý | $ 66 | Ìý | 4,871 | Ìý | 1,334 | (310) | Ìý | 1,830 | 251 |
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Comprehensive income (loss) | 277 | Ìý | Ìý | Ìý | Ìý | Ìý | 399 | Ìý | Ìý | (173) | 51 |
| Stock and other incentive plans (in shares) | Ìý | Ìý | 2,000,000.0 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Stock and other incentive plans, APIC | Ìý | Ìý | Ìý | Ìý | (10) | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Stock and other incentive plans | 23 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 33 | Ìý | Ìý | Ìý |
| Common stock repurchases (in shares) | Ìý | Ìý | (10,400,000) | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Common stock repurchases, net of excise tax | (153) | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (153) | Ìý | Ìý | Ìý |
| Net distributions to noncontrolling interests | $ (67) | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (67) |
| Balance, end of period (in shares) at Dec. 31, 2023 | 504,886,773 | Ìý | 504,900,000 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Balance, end of period at Dec. 31, 2023 | $ 8,122 | Ìý | $ 66 | Ìý | 4,861 | Ìý | 1,733 | (430) | Ìý | 1,657 | 235 |
| Increase (Decrease) in Stockholders' Equity [Roll Forward] | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Comprehensive income (loss) | (828) | Ìý | Ìý | Ìý | Ìý | Ìý | (754) | Ìý | Ìý | (120) | 46 |
| Stock Issued During Period, Value, Acquisitions | Ìý | $ 343 | Ìý | Ìý | Ìý | $ (130) | Ìý | Ìý | $ 473 | Ìý | Ìý |
| Stock and other incentive plans (in shares) | Ìý | Ìý | 1,000,000.0 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Acquisition (in shares) | Ìý | 25.9 | Ìý | 25,900,000 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Stock and other incentive plans, APIC | Ìý | Ìý | Ìý | Ìý | 27 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Stock and other incentive plans | 45 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 18 | Ìý | Ìý | Ìý |
| Common stock repurchases (in shares) | Ìý | Ìý | (37,900,000) | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Common stock repurchases, net of excise tax | (737) | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (737) | Ìý | Ìý | Ìý |
| Net distributions to noncontrolling interests | $ (48) | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (48) |
| Balance, end of period (in shares) at Dec. 31, 2024 | 493,948,905 | Ìý | 493,900,000 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Balance, end of period at Dec. 31, 2024 | $ 6,897 | Ìý | $ 66 | Ìý | $ 4,758 | Ìý | $ 979 | $ (676) | Ìý | $ 1,537 | $ 233 |
| X | ||||||||||
- Definition Amount of increase to additional paid-in capital (APIC) for recognition of cost for award under share-based payment arrangement. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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| X | ||||||||||
- Definition Decrease in noncontrolling interest balance from payment of dividends or other distributions by the non-wholly owned subsidiary or partially owned entity, included in the consolidation of the parent entity, to the noncontrolling interest holders. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Number of shares of stock issued during the period pursuant to acquisitions. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Number of shares issued during the period as a result of the conversion of convertible securities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Number, after forfeiture, of shares or units issued under share-based payment arrangement. Excludes shares or units issued under employee stock ownership plan (ESOP). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Value of stock issued pursuant to acquisitions during the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The gross value of stock issued during the period upon the conversion of convertible securities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The net amount of stock issued during the period upon the conversion of convertible securities, net of adjustments (for example, to additional paid in capital) including the write-off of an equity component recognized to record the convertible debt instrument as two separate components - a debt component and an equity component. This item is meant to disclose the value of shares issued on conversion of convertible securities that were recorded as two separate (debt and equity) components. No definition available.
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| X | ||||||||||
- Definition Value, after forfeiture, of shares issued under share-based payment arrangement. Excludes employee stock ownership plan (ESOP). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of equity (deficit) attributable to parent and noncontrolling interest. Excludes temporary equity. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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