Leases Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Assets and Liabilities, Lessee [Abstract]
Cash paid for amounts included in the measurement of lease liability - operating cash flows	$ 244	$ 253
ROU assets obtained in exchange for new lease liabilities	$ 52	$ 242
Weighted-average remaining lease term	8 years	8 years
Weighted-average discount rate	4.40%	4.40%
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2025	$ 231
2026	191
2027	186
2028	152
2029	106
Thereafter	428
Total undiscounted cash flows	1,294
Less: interest	215
Lease liability	1,079	$ 1,231
Lessee Disclosure [Abstract]
ROU assets	$ 928	$ 1,061
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets
Lease liability	$ 1,079	$ 1,231
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Other liabilities	Other liabilities