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Revenue (Tables)
 3 Months Ended
Dec. 31, 2021
Revenue from Contract with Customer [Abstract]  
State [Table Text Block] TVA's operating revenues by state for the three months ended December 31, 2021 and 2020, are detailed in the table below:
Operating Revenues By State
(in millions)
Three Months Ended December 31
 20212020
Alabama
$371 $334 
Georgia
64 58 
Kentucky
171 137 
Mississippi
241 212 
North Carolina
20 16 
Tennessee
1,659 1,501 
Virginia
11 10 
Subtotal2,537 2,268 
Off-system sales1 2 
Revenue from sales of electricity2,538 2,270 
Other revenue45 34 
Total operating revenues$2,583 $2,304 
Revenue from External Customers by Products and Services [Table Text Block] TVA's operating revenues by customer type for the three months ended December 31, 2021 and 2020, are detailed in the table below:
Operating Revenues by Customer Type
(in millions)
Three Months Ended December 31
 20212020
Revenue from sales of electricity  
Local power companies$2,306 $2,091 
Industries directly served205 154 
Federal agencies and other27 25 
Revenue from sales of electricity2,538 2,270 
Other revenue45 34 
Total operating revenues$2,583 $2,304 
Schedule of Long-term Contracts for Purchase of Electric Power The number of LPCs by contract arrangement, the revenues derived from such arrangements for the three months ended December 31, 2021, and the percentage those revenues comprised of TVA's total operating revenues for the same periods, are summarized in the tables below:
TVA Local Power Company Contracts
At or for the Three Months Ended December 31, 2021
Contract Arrangements(1)
Number of LPCs
Revenue from Sales of Electricity to LPCs
(in millions)
Percentage of Total Operating Revenues
20-year termination notice146 $1,973 76.4 %
 5-year termination notice7 333 12.9 %
Total153 $2,306 89.3 %
Note
(1) Ordinarily, the LPCs and TVA have the same termination notice period; however, in a contract with one of the LPCs with five-year termination notice, TVA has a 10-year termination notice (which becomes a five-year termination notice if TVA loses its discretionary wholesale rate-setting authority). Certain LPCs have five-year termination notices or a shorter period if any act of Congress, court decision, or regulatory change requires or permits that election.