Goodwill and Intangible assets, net - Additional Information (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)
Goodwill [Line Items]
Goodwill impairment	$ 983	$ 0	$ 983	$ 0
Goodwill	2,229		2,229		$ 3,212
Intangible asset amortization	70	$ 69	$ 141	$ 140
Health And Wealth Solutions Reporting Units
Goodwill [Line Items]
Utilized discount rate			0.115
Long-term growth rate			0.035
Health Solutions Reporting Unit
Goodwill [Line Items]
Goodwill impairment			$ 200
Increase in hypothetical basis point in discount rate			0.0025
Decrease in hypothetical basis point in long-term growth rate			0.0050
Goodwill	2,101		$ 2,101
Wealth Solutions Reporting Unit
Goodwill [Line Items]
Goodwill	$ 128		$ 128