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EMPLOYEE RETIREMENT PLANS - Benefits Expected to be Paid in Each of the Next Five Years, and in Aggregate for the Five Years Thereafter (Details)
$ in Millions
Dec. 31, 2016
USD ($)
Qualified  
Benefits expected to be paid in each of the next five years, and in aggregate for the five years thereafter  
2017 $ 49
2018 50
2019 50
2020 52
2021 52
2022-2026 272
Non-Qualified  
Benefits expected to be paid in each of the next five years, and in aggregate for the five years thereafter  
2017 12
2018 12
2019 12
2020 12
2021 12
2022-2026 $ 58