Employee Benefit Plans - Expected long-term return by asset category (Details)	12 Months Ended
	Dec. 31, 2024
Growth assets
Expected Long Term Return [Abstract]
Expected long-term return	7.40%
Asset allocation [Abstract]
Asset allocation	51.00%
Hedging assets
Expected Long Term Return [Abstract]
Expected long-term return	5.00%
Asset allocation [Abstract]
Asset allocation	32.00%
Cash
Expected Long Term Return [Abstract]
Expected long-term return	4.80%
Asset allocation [Abstract]
Asset allocation	18.00%