v3.25.0.1
Leases: (Other Lease Information) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Leases [Abstract]      
Cash paid for amounts included in the measurement of lease liabilities in operating cash flow $ 281 $ 265 $ 243
Cash paid for amounts included in the measurement of lease liabilities in financing cash flows 29 27 76
Leased assets obtained in exchange for new lease liabilities 214 205 255
Leased assets obtained in exchange for new lease liabilities $ 73 $ 55 $ 100
Weighted-average remaining lease term (years) 10 years 4 months 24 days 10 years 2 months 12 days 10 years 3 months 18 days
Weighted-average remaining lease term (years) 2 years 7 months 6 days 2 years 7 months 6 days 2 years 1 month 6 days
Weighted-average discount rate (as a percent) 5.90% 5.10% 3.40%
Weighted-average discount rate (as a percent) 4.40% 4.90% 4.40%