Acquisitions and Dispositions (Acquired Finite-Lived Intangible Assets) (Details) $ in Millions	6 Months Ended
	Jun. 30, 2024 USD ($)
Finite-Lived Intangible Assets [Line Items]
Amount	$ 215
Client relationships
Finite-Lived Intangible Assets [Line Items]
Amount	$ 205
Weighted Average Amortization Period	11 years 9 months 18 days
Other
Finite-Lived Intangible Assets [Line Items]
Amount	$ 10
Weighted Average Amortization Period	2 years 9 months 18 days