Revenue from Contracts with Customers (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Mar. 31, 2024
Disaggregation of Revenue [Line Items]
Total financial services and software subscriptions and services revenue	$ 528	$ 481	$ 1,047	$ 971
Revenue from other sources	87	79	169	131
Total fee income and other revenue	615	560	1,216	1,102
Net receivables	297		297		$ 339
Wealth Solutions
Disaggregation of Revenue [Line Items]
Total financial services and software subscriptions and services revenue	157	124	300	244
Wealth Solutions | Distribution and shareholder servicing
Disaggregation of Revenue [Line Items]
Total financial services and software subscriptions and services revenue	32	30	66	59
Investment Management
Disaggregation of Revenue [Line Items]
Total financial services and software subscriptions and services revenue	242	232	484	462
Investment Management | Distribution and shareholder servicing
Disaggregation of Revenue [Line Items]
Total financial services and software subscriptions and services revenue	40	32	79	64
Health Solutions
Disaggregation of Revenue [Line Items]
Total financial services and software subscriptions and services revenue	7	4	12	11
Benefitfocus
Disaggregation of Revenue [Line Items]
Total financial services and software subscriptions and services revenue	50	54	104	114
Corporate
Disaggregation of Revenue [Line Items]
Total financial services and software subscriptions and services revenue	$ 0	$ 5	$ 2	$ 17