Leases (Lease Cost and Additional Information) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Leases [Abstract]
Operating lease cost	$ 88	$ 84	$ 262	$ 247
Short-term lease cost	1	1	4	4
Variable lease cost	35	31	101	85
Sublease income	(6)	(2)	(16)	(10)
Net lease cost	$ 118	$ 114	351	326
Operating cash outflows from operating leases			300	278
ROU assets obtained in exchange for new operating lease liabilities			$ 94	$ 135
Weighted average remaining lease term – real estate	7 years 3 months 18 days	7 years 9 months 18 days	7 years 3 months 18 days	7 years 9 months 18 days
Weighted average discount rate – real estate leases	3.79%	3.64%	3.79%	3.64%