Share-based compensation (Tables)

12 Months Ended

Dec. 31, 2024

Share-Based Payment Arrangement [Abstract]

Schedule of Share-based Compensation Expense

The share-based compensation for these plans for the years ended December 31 was:

in $ millions	2024	2023	2022
Performance Share Plan expense	123	120	97
Share Option expense	2	3	3
Total share-based compensation	125	123	100

Schedule of Details of Awards Granted Under Performance Share Plan

The details of the awards granted under the PSP for the year ended December 31, 2024 were:

	Number of shares	Weighted average grant date fair value
	Shares in whole numbers	Amounts in $	Amounts in €
Outstanding at beginning of year	9,816,619	41.56	37.90
Granted	1,856,679	79.52	73.85
Forfeited	(294,689)	46.12	41.44
Vested	(3,080,029)	40.93	34.97
Outstanding at end of year	8,298,580	50.11	46.89

Schedule of Valuation Assumptions

The fair value assigned to the portion of awards subject to a TSR performance metric was calculated using the Monte Carlo simulation model, at the grant date, taking account of peer group TSR, volatilities and correlations together with the following assumptions:

	2024	2023	2022
Risk-free interest rate (%)	4.44	3.16	0.51
Expected volatility (%)	30.3	28.9	36.9

Schedule of Valuation Assumptions

The assumptions used to determine the fair value of the options issued under the Share Options Schemes with three-year and five-year savings periods at December 31 were:

	2022
	3-year	5-year
Risk-free interest rate (%)	2.08	2.24
Expected dividend payments over the expected life (€)	4.06	7.05
Expected volatility (%)	26.4	24.2
Expected life term (years)	3	5