Leases (Lease Cost and Additional Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Lessee, Lease, Description [Line Items]
Operating lease cost	$ 331	$ 324
Short-term lease cost	6	5
Variable lease cost	116	122
Sub-lease income	(15)	(11)
Net lease cost	438	440
Operating cash outflows from operating leases	376	379
Right of use assets obtained in exchange for new operating lease liabilities	$ 279	$ 224
Real Estate Lease
Lessee, Lease, Description [Line Items]
Weighted average remaining lease term – real estate	7 years 6 months 25 days	7 years 11 months 23 days
Weighted average discount rate – real estate leases	3.73%	3.35%