Annual report pursuant to Section 13 and 15(d)

BENEFIT PLANS - Fair Value of Plan Assets (Details)

v3.20.4
BENEFIT PLANS - Fair Value of Plan Assets (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Summary of plan assets investments    
Fair value of plan assets $ 1,050 $ 931
Fair value of plan assets, Percentage 100.00% 100.00%
Mutual funds-money market    
Summary of plan assets investments    
Fair value of plan assets $ 20 $ 7
Fair value of plan assets, Percentage 2.00% 1.00%
Corporate obligations    
Summary of plan assets investments    
Fair value of plan assets $ 522 $ 460
Fair value of plan assets, Percentage 50.00% 49.00%
U.S. Government obligations    
Summary of plan assets investments    
Fair value of plan assets $ 208 $ 199
Fair value of plan assets, Percentage 20.00% 21.00%
Municipal obligations    
Summary of plan assets investments    
Fair value of plan assets $ 6 $ 5
Fair value of plan assets, Percentage 0.00% 1.00%
Collective trust funds    
Summary of plan assets investments    
Fair value of plan assets $ 118 $ 105
Fair value of plan assets, Percentage 11.00% 11.00%
Common stock    
Summary of plan assets investments    
Fair value of plan assets $ 48 $ 53
Fair value of plan assets, Percentage 5.00% 6.00%
Preferred stock    
Summary of plan assets investments    
Fair value of plan assets $ 5 $ 5
Fair value of plan assets, Percentage 0.00% 1.00%
Limited liability companies    
Summary of plan assets investments    
Fair value of plan assets $ 39 $ 43
Fair value of plan assets, Percentage 4.00% 4.00%
Collective trust funds    
Summary of plan assets investments    
Fair value of plan assets $ 33 $ 35
Fair value of plan assets, Percentage 3.00% 4.00%
Limited partnerships    
Summary of plan assets investments    
Fair value of plan assets $ 51 $ 19
Fair value of plan assets, Percentage 5.00% 2.00%