v3.26.1
Statements of Changes in Individual Plan Net Assets Available for Benefits
12 Months Ended
Dec. 31, 2025
USD ($)
Hourly Plan  
Contributions  
Total contributions $ 15,530,357
Total Plan interest in Savings Plans Master Trust for Alcoa USA Corporation investment income 37,674,594
Total additions 53,204,951
Deductions  
Benefit payments to participants (32,185,897)
Net increase prior to Plan transfers 21,019,054
Transfers between plans, net (388,997)
Net increase 20,630,057
Net assets available for benefits, Beginning of year 246,030,062
Net assets available for benefits, End of year 266,660,119
Hourly Plan | Alcoa Corporation Stock Fund  
Contributions  
Participant 178,746
Employer 75,063
Total Plan interest in Savings Plans Master Trust for Alcoa USA Corporation investment income 1,813,765
Hourly Plan | Self-Directed Brokerage Accounts  
Contributions  
Total Plan interest in Savings Plans Master Trust for Alcoa USA Corporation investment income 982,752
Hourly Plan | Other investments  
Contributions  
Participant 9,344,053
Employer 5,932,495
Total Plan interest in Savings Plans Master Trust for Alcoa USA Corporation investment income 34,878,077
Salaried Plan  
Contributions  
Total contributions 20,131,633
Total Plan interest in Savings Plans Master Trust for Alcoa USA Corporation investment income 67,920,616
Total additions 88,052,249
Deductions  
Benefit payments to participants (69,851,078)
Net increase prior to Plan transfers 18,201,171
Transfers between plans, net 388,997
Net increase 18,590,168
Net assets available for benefits, Beginning of year 423,989,961
Net assets available for benefits, End of year 442,580,129
Salaried Plan | Alcoa Corporation Stock Fund  
Contributions  
Participant 128,769
Employer 122,045
Total Plan interest in Savings Plans Master Trust for Alcoa USA Corporation investment income 3,421,653
Salaried Plan | Self-Directed Brokerage Accounts  
Contributions  
Total Plan interest in Savings Plans Master Trust for Alcoa USA Corporation investment income 3,508,759
Salaried Plan | Other investments  
Contributions  
Participant 11,049,451
Employer 8,831,368
Total Plan interest in Savings Plans Master Trust for Alcoa USA Corporation investment income $ 60,990,204