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Net Income Per Share (Tables) | 3 Months Ended
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Mar. 31, 2026
Earnings Per Share [Abstract] |
Reconciliation of Shares Used in Computation of Basic and Diluted Net Income Per Share | A reconciliation of the shares used in the computation of basic and diluted net income (loss) per share is as follows:
| Three Months Ended March 31, |  |
(AMOUNTS IN MILLIONS EXCEPT PER SHARE AMOUNTS) | 2026 |  | 2025 |  |  |  |
Net Income (Loss) |  |  |  |  |  |  |
Net income (loss) available to IFF shareholders | $ | 169 |  |  | $ | (1,018) |  |  |  |  |
Shares |  |  |  |  |  |  |
Weighted average common shares outstanding (basic) | 256 |  |  | 256 |  |  |  |  |
Adjustment for assumed dilution: |  |  |  |  |  |  |
Stock options and restricted stock awards | 1 |  |  | — |  |  |  |  |
Weighted average shares assuming dilution (diluted) | 257 |  |  | 256 |  |  |  |  |
Net Income (Loss) per Share |  |  |  |  |  |  |
Net income (loss) per share - basic and diluted | $ | 0.66 |  |  | $ | (3.98) |  |  |  |  |

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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
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