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Segmentation of key figures (Tables) | 6 Months Ended
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Jun. 30, 2025
Operating Segments [Abstract] |
Disclosure of segment information | Net sales and other revenues by segment
|  | Three months ended June 30 |  | Six months ended June 30
($ millions) |  | 2025 | 2024 |  | 2025 | 2024
Surgical |  |  |  |  |  |
Implantables |  | 456 |  | 464 |  |  | 876 |  | 897 |
Consumables |  | 777 |  | 736 |  |  | 1,489 |  | 1,422 |
Equipment/other |  | 222 |  | 223 |  |  | 421 |  | 442 |
Total Surgical net sales |  | 1,455 |  | 1,423 |  |  | 2,786 |  | 2,761 |
Vision Care |  |  |  |  |  |
Contact lenses |  | 692 |  | 636 |  |  | 1,380 |  | 1,307 |
Ocular health |  | 430 |  | 423 |  |  | 862 |  | 858 |
Total Vision Care net sales |  | 1,122 |  | 1,059 |  |  | 2,242 |  | 2,165 |
Total net sales |  | 2,577 |  | 2,482 |  |  | 5,028 |  | 4,926 |
Surgical other revenues |  | — |  | — |  |  | 1 |  | — |
Vision Care other revenues |  | 19 |  | 14 |  |  | 40 |  | 29 |
Total other revenues |  | 19 |  | 14 |  |  | 41 |  | 29 |
Total net sales and other revenues |  | 2,596 |  | 2,496 |  |  | 5,069 | 4,955 |
Segment contribution and reconciliation to income before taxes The below tables summarize segment contribution, including material items of income and expense as required by IFRS 8, Operating Segments, and the associated IFRIC agenda decision published in July 2024. The below tables also include a reconciliation of segment contribution to Income before taxes.
| Surgical |  | Vision Care |  | Not allocated to segments |  | Total
| Three months ended June 30 |  | Three months ended June 30 |  | Three months ended June 30 |  | Three months ended June 30
($ millions) | 2025 | 2024 |  | 2025 | 2024 |  | 2025 | 2024 |  | 2025 | 2024
Net sales | 1,455 |  | 1,423 |  |  | 1,122 |  | 1,059 |  |  | — |  | — |  |  | 2,577 |  | 2,482 |
Other revenues | — |  | — |  |  | 19 |  | 14 |  |  | — |  | — |  |  | 19 |  | 14 |
Cost of net sales | (553) |  | (510) |  |  | (416) |  | (422) |  |  | (227) |  | (176) |  |  | (1,196) |  | (1,108) |
Cost of other revenues | — |  | — |  |  | (12) |  | (14) |  |  | — |  | — |  |  | (12) |  | (14) |
Selling, general & administration | (372) |  | (368) |  |  | (415) |  | (390) |  |  | (83) |  | (79) |  |  | (870) |  | (837) |
Research & development | (152) |  | (142) |  |  | (90) |  | (67) |  |  | (3) |  | (11) |  |  | (245) |  | (220) |
Other income | — |  | — |  |  | — |  | — |  |  | 5 |  | 5 |  |  | 5 |  | 5 |
Other expense | — |  | — |  |  | — |  | — |  |  | (31) |  | (4) |  |  | (31) |  | (4) |
Segment contribution and Operating income | 378 |  | 403 |  |  | 208 |  | 180 |  |  | (339) |  | (265) |  |  | 247 |  | 318 |
Interest expense |  |  |  |  |  |  | (51) |  | (50) |  |  | (51) |  | (50) |
Other financial income & expense |  |  |  |  |  |  | 4 |  | 12 |  |  | 4 |  | 12 |
Share of (loss) from associated companies |  |  |  |  |  |  | (1) |  | — |  |  | (1) |  | — |
Income before taxes |  |  |  |  |  |  |  |  |  | 199 |  | 280 |
| Surgical |  | Vision Care |  | Not allocated to segments |  | Total
| Six months ended June 30 |  | Six months ended June 30 |  | Six months ended June 30 |  | Six months ended June 30
($ millions) | 2025 | 2024 |  | 2025 | 2024 |  | 2025 | 2024 |  | 2025 | 2024
Net sales | 2,786 |  | 2,761 |  |  | 2,242 |  | 2,165 |  |  | — |  | — |  |  | 5,028 |  | 4,926 |
Other revenues | 1 |  | — |  |  | 40 |  | 29 |  |  | — |  | — |  |  | 41 |  | 29 |
Cost of net sales | (1,049) |  | (980) |  |  | (813) |  | (838) |  |  | (405) |  | (353) |  |  | (2,267) |  | (2,171) |
Cost of other revenues | (1) |  | — |  |  | (30) |  | (28) |  |  | — |  | — |  |  | (31) |  | (28) |
Selling, general & administration | (728) |  | (720) |  |  | (788) |  | (758) |  |  | (167) |  | (161) |  |  | (1,683) |  | (1,639) |
Research & development | (295) |  | (272) |  |  | (162) |  | (132) |  |  | (10) |  | (15) |  |  | (467) |  | (419) |
Other income | — |  | — |  |  | — |  | — |  |  | 154 |  | 11 |  |  | 154 |  | 11 |
Other expense | — |  | — |  |  | — |  | — |  |  | (60) |  | (23) |  |  | (60) |  | (23) |
Segment contribution and Operating income | 714 |  | 789 |  |  | 489 |  | 438 |  |  | (488) |  | (541) |  |  | 715 |  | 686 |
Interest expense |  |  |  |  |  |  | (100) |  | (95) |  |  | (100) |  | (95) |
Other financial income & expense |  |  |  |  |  |  | 13 |  | 24 |  |  | 13 |  | 24 |
Share of (loss) from associated companies |  |  |  |  |  |  | (15) |  | — |  |  | (15) |  | — |
Income before taxes |  |  |  |  |  |  |  |  |  | 613 |  | 615 |
Disclosure of net sales by region | Net sales by region(1)
| Three months ended June 30 |  | Six months ended June 30
($ millions unless indicated otherwise) | 2025 | 2024 |  | 2025 | 2024
United States | 1,160 |  | 45 | % | 1,141 |  | 46 | % |  | 2,297 |  | 46 | % | 2,290 |  | 46 | %
International | 1,417 |  | 55 | % | 1,341 |  | 54 | % |  | 2,731 |  | 54 | % | 2,636 |  | 54 | %
Net sales | 2,577 |  | 100 | % | 2,482 |  | 100 | % |  | 5,028 |  | 100 | % | 4,926 |  | 100 | %
(1) Net sales by location of third-party customer.

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