Dividends and earnings per share (Details) shares in Millions, $ in Millions |
1 Months Ended | 3 Months Ended | 6 Months Ended | |||||
|---|---|---|---|---|---|---|---|---|
|
Feb. 27, 2024
SFr / shares
|
Feb. 27, 2023
SFr / shares
|
May 31, 2024
USD ($)
|
May 31, 2023
USD ($)
|
Jun. 30, 2024
shares
|
Jun. 30, 2023
shares
|
Jun. 30, 2024
shares
|
Jun. 30, 2023
shares
|
|
| Earnings per share [abstract] | ||||||||
| Dividend declared (in dollars per share) | SFr / shares | SFr 0.24 | SFr 0.21 | ||||||
| Dividends paid | $ | $ 130 | $ 116 | ||||||
| Number of shares outstanding | 494.5 | 494.5 | ||||||
| Number of shares vested | 1.2 | |||||||
| Weighted average number of shares outstanding - basic (in shares) | 494.5 | 493.2 | 494.1 | 492.8 | ||||
| Weighted average number of shares outstanding - diluted (in shares) | 497.0 | 495.7 | 496.7 | 495.9 | ||||
| Potentially dilutive shares (in shares) | 2.5 | 2.5 | 2.6 | 3.1 | ||||