Acquisitions and Dispositions (Acquired Finite-Lived Intangible Assets) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($)
Finite-Lived Intangible Assets [Line Items]
Amount	$ 115
Client relationships
Finite-Lived Intangible Assets [Line Items]
Amount	$ 112
Weighted Average Amortization Period	10 years 10 months 24 days
Other
Finite-Lived Intangible Assets [Line Items]
Amount	$ 3
Weighted Average Amortization Period	2 years 9 months 18 days