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Commitments and 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
At December 31, 2020, our future rental commitments for Right-of-Way agreements were as follows:
 Right-of-Way Agreements
 (Dollars in millions)
2021$221 
2022135 
202391 
202478 
202567 
2026 and thereafter673 
Total future minimum payments$1,265