XML 165 R117.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Benefit Plans (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Actuarial (gain) loss $ 261 $ (187)  
Assumptions used in calculating assumed health care cost trend rate 4.00%    
Percentage of limited partnerships employing hedge fund strategies focused on fixed income and equity investments 61.00% 65.00%  
Defined contribution plan, maximum annual contributions per employee, percent 50.00%    
Defined contribution plan, employer matching contribution, percent of match 70.00%    
Defined contribution plan, employer matching contribution, percent of employees' gross pay 6.00%    
Defined contribution plan, employers matching contribution, vesting period in years 5 years    
Benefit expense for the Company's savings plan $ 71 $ 71 $ 76
Additional Contribution, Management Discretion      
Defined contribution plan, employer matching contribution, percent of match 80.00%    
Defined contribution plan, employer matching contribution, percent of employees' gross pay 6.00%    
Defined contribution plan, employer discretionary contribution amount, percent 2.00%    
First Year of Employment      
Defined contribution plan, employer matching contribution, percent of match 35.00%    
Defined contribution plan, employer matching contribution, percent of employees' gross pay 6.00%    
Pension Benefits      
Defined benefit plan, accumulated benefit obligation $ 2,661 2,465  
Actuarial (gain) loss 261 (187)  
Total non-service cost (benefit) (3) $ (23) $ (7)
Future capital call commitments for limited partnership investments $ 108    
Percentage of limited partnerships employing hedge fund strategies focused on fixed income and equity investments 79.00% 81.00%  
Limited partnership equity related hedge fund strategy plan assets 62.00%    
Limited partnership hedge fund multi strategy plan assets 31.00%    
Limited partnership hedge fund strategy distressed investments plan assets 7.00%    
Defined benefit plan, expected future employer contributions, next fiscal year $ 8    
Postretirement Benefits      
Actuarial (gain) loss $ 1 $ 0  
Defined benefit plan, health care cost trend rate assumed for next fiscal year 4.00% 4.00% 4.00%
Defined benefit plan, expected future employer contributions, next fiscal year $ 1    
Minimum      
Defined benefit plan, plan assets, target allocation, percentage 40.00%    
Company contribution of eligible compensation, depending on age, percent 3.00%    
Maximum      
Defined benefit plan, plan assets, target allocation, percentage 60.00%    
Company contribution of eligible compensation, depending on age, percent 5.00%    
Insurance Claims and Policyholder's Benefits, Including Policyholder's Dividends | Pension Benefits      
Total non-service cost (benefit) $ 1 $ 8 $ 2
Other Expense | Pension Benefits      
Total non-service cost (benefit) $ 2 $ 15 $ 5