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Commitments, Contingencies and Other Items (Tables)
 12 Months Ended
Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]  
Schedule of future rental commitments for right-of-way agreements
As of December 31, 2020, our future rental commitments for right-of-way agreements were as follows:
Right-of-Way
Agreements
(Dollars in millions)
2021$109 
202263 
202362 
202451 
202544 
2026 and thereafter284 
Total future minimum payments$613