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Retirement Plans (Tables)
12 Months Ended
Dec. 31, 2019
Retirement Plans [Abstract]  
Projected Benefit Obligation, Fair Values Of Plan Assets And Amounts Recognized In The Balance Sheet
($ in millions)
 
2019
   
2018
 
             
Change in projected benefit obligation (PBO)
           
PBO at beginning of year
 
$
3,173
   
$
3,363
 
Service cost
   
82
     
90
 
Interest cost
   
130
     
125
 
Actuarial (gain) loss
   
603
     
(88
)
Benefits paid
   
(65
)
   
(63
)
Settlements
   
(235
)
   
(254
)
Special termination benefits
   
38
     
-
 
PBO at end of year
 
$
3,726
   
$
3,173
 
                 
Change in plan assets
               
Fair value of plan assets at beginning of year
 
$
2,348
   
$
2,674
 
Actual return on plan assets
   
516
     
(159
)
Employer contributions
   
166
     
150
 
Settlements
   
(235
)
   
(254
)
Benefits paid
   
(65
)
   
(63
)
Fair value of plan assets at end of year
 
$
2,730
   
$
2,348
 
                 
Funded status
 
$
(996
)
 
$
(825
)
                 
Amounts recognized in the consolidated balance sheet
               
Pension and other postretirement benefits – current
 
$
-
   
$
-
 
Pension and other postretirement benefits – noncurrent
 
$
(996
)
 
$
(825
)
Accumulated other comprehensive loss
 
$
899
   
$
754
 
Net Periodic Benefit Cost
($ in millions)
 
2019
   
2018
   
2017
 
                   
Components of total pension benefit cost
                 
Service cost
 
$
82
   
$
90
   
$
97
 
Interest cost on projected benefit obligation
   
130
     
125
     
127
 
Expected return on plan assets
   
(172
)
   
(192
)
   
(186
)
Amortization of unrecognized loss
   
58
     
24
     
30
 
Net periodic pension benefit cost
   
98
     
47
     
68
 
Pension settlement costs
   
57
     
41
     
83
 
Pension special termination benefit enhancements
   
38
     
-
     
5
 
Total pension benefit cost
 
$
193
   
$
88
   
$
156
 
Weighted Average Asset Allocations, By Asset Category

 
2019
   
2018
 
Asset category:
           
Equity securities
   
49
%
   
48
%
Debt securities
   
39
%
   
40
%
Alternative investments
   
12
%
   
12
%
Total
   
100
%
   
100
%
Expected Benefit Payments Over The Next Ten Years
($ in millions)
Amount
     
2020
$
296
2021
 
295
2022
 
286
2023
 
279
2024
 
277
2025-2029
 
1,308
Total
$
2,741
Schedule Of Assumptions Used

 
2019
   
2018
   
2017
 
Discount rate - used at year end to value obligation
   
3.40
%
   
4.30
%
   
3.70
%
Discount rate - used at beginning of year to compute annual cost
   
4.30
%
   
3.70
%
   
4.10
%
Expected long-term rate of return on plan assets
   
7.50
%
   
7.50
%
   
7.50
%
Rate of increase in compensation levels
   
2.00
%
   
2.00
%
   
2.50
%
Schedule Of Changes In Projected Benefit Obligations For OPEB
($ in millions)
 
2019
   
2018
 
             
Change in benefit obligation
           
Benefit obligation at beginning of year
 
$
965
   
$
1,016
 
Service cost
   
20
     
21
 
Interest cost
   
41
     
38
 
Plan amendments
   
(149
)
   
-
 
Plan participants’ contributions
   
7
     
7
 
Actuarial (gain) loss
   
129
     
(79
)
Benefits paid
   
(47
)
   
(38
)
Special termination benefits
   
6
     
-
 
Benefit obligation at end of year
 
$
972
   
$
965
 
                 
Change in plan assets
               
Fair value of plan assets at beginning of year
 
$
-
   
$
-
 
Plan participants’ contributions
   
7
     
7
 
Employer contribution
   
40
     
31
 
Benefits paid
   
(47
)
   
(38
)
Fair value of plan assets at end of year
 
$
-
   
$
-
 
                 
Funded status
 
$
(972
)
 
$
(965
)
                 
Amounts recognized in the consolidated balance sheet
               
Pension and other postretirement benefits – current
 
$
(43
)
 
$
(39
)
Pension and other postretirement benefits – noncurrent
 
$
(900
)
 
$
(926
)
Pension and other postretirement benefits – AHFS*
 
$
(29
)
 
$
-
 
Accumulated other comprehensive (gain) loss
 
$
(45
)
 
$
(41
)


* Assets Held for Sale
Schedule Of Net Benefit Costs For OPEB
($ in millions)
 
2019
   
2018
   
2017
 
                   
Components of total postretirement benefit cost
                 
Service cost
 
$
20
   
$
21
   
$
21
 
Interest cost on projected benefit obligation
   
41
     
38
     
40
 
Amortization of prior service credit
   
(11
)
   
(9
)
   
(9
)
Amortization of unrecognized gain (loss)
   
(4
)
   
3
     
-
 
Net periodic postretirement benefit cost
   
46
     
53
     
52
 
OPEB special termination benefit enhancements
   
6
     
-
     
-
 
Total postretirement benefit cost
 
$
52
   
$
53
   
$
52
 
Schedule Of Assumptions Used For OPEB

 
2019
   
2018
   
2017
 
Discount rate - used at year end to value obligation
   
3.40% - 3.50
%
   
4.30% - 4.40
%
   
3.70% - 3.80
%
Discount rate - used to compute annual cost
   
4.30% - 4.40
%
   
3.70% - 3.80
%
   
4.10% - 4.30
%
Schedule Of Expected Benefit Payments For OPEB
($ in millions)
Gross Benefit
 
Medicare
Part D Subsidy
 
Total
                 
2020
$
43
 
$
-
 
$
43
2021
 
49
   
-
   
49
2022
 
49
   
-
   
49
2023
 
48
   
-
   
48
2024
 
53
   
-
   
53
2025-2029
 
274
   
2
   
276
Total
$
516
 
$
2
 
$
518
Net Periodic Benefit Cost Not Yet Recognized

 
Pension Plan
   
OPEB
 
($ in millions)
 
2019
   
2018
   
2019
   
2018
 
Net actuarial loss
 
$
899
   
$
754
   
$
105
   
$
(28
)
Prior service credit
   
-
     
-
     
(150
)
   
(13
)
Total
 
$
899
   
$
754
   
$
(45
)
 
$
(41
)
Amounts Recognized As A Component Of AOCI

 
Pension Plan
   
OPEB
 
($ in millions)
 
2019
   
2018
   
2019
   
2018
 
Accumulated other comprehensive (gain) loss at beginning of year
 
$
754
   
$
556
   
$
(41
)
 
$
33
 
                                 
Net actuarial (gain) loss recognized during year
   
(58
)
   
(24
)
   
4
     
(3
)
Prior service credit recognized during year
   
-
     
-
     
11
     
9
 
Prior service credit occurring during year
   
-
     
-
     
(149
)
   
-
 
Net actuarial (gain) loss occurring during year
   
260
     
263
     
130
     
(80
)
Settlement loss recognized
   
(57
)
   
(41
)
   
-
     
-
 
Net amount recognized in comprehensive income (loss) for the year
   
145
     
198
     
(4
)
   
(74
)
Accumulated other comprehensive (gain) loss at end of year
 
$
899
   
$
754
   
$
(45
)
 
$
(41
)