Acquisitions and Dispositions (Acquired Finite-Lived Intangible Assets) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2025 USD ($)
Finite-Lived Intangible Assets [Line Items]
Amount	$ 24
Client relationships
Finite-Lived Intangible Assets [Line Items]
Amount	$ 22
Weighted Average Amortization Period	12 years 10 months 24 days
Other
Finite-Lived Intangible Assets [Line Items]
Amount	$ 2
Weighted Average Amortization Period	5 years