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Commitments, Contingencies and Other Items (Tables)
 12 Months Ended
Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]  
Right-of-way
At December 31, 2020, our future rental commitments for Right-of-Way agreements were as follows:
Right-of-Way Agreements
(Dollars in millions)
2021$19 
20228 
20236 
20245 
20254 
2026 and thereafter20 
Total future minimum payments
$62