v3.24.0.1
Leases: (Other Lease Information) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Leases [Abstract]      
Cash paid for amounts included in the measurement of lease liabilities in operating cash flow $ 265 $ 243 $ 259
Cash paid for amounts included in the measurement of lease liabilities in financing cash flows 27 76 26
Leased assets obtained in exchange for new lease liabilities 205 255 64
Leased assets obtained in exchange for new lease liabilities $ 55 $ 100 $ 89
Weighted-average remaining lease term (years) 10 years 2 months 12 days 10 years 3 months 18 days 8 years 3 months 18 days
Weighted-average remaining lease term (years) 2 years 7 months 6 days 2 years 1 month 6 days 1 year 8 months 12 days
Weighted-average discount rate (as a percent) 5.10% 3.40% 3.60%
Weighted-average discount rate (as a percent) 4.90% 4.40% 5.30%