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Postretirement Benefit Plans (Tables)
 12 Months Ended
Dec. 31, 2019
Retirement Benefits [Abstract]  
Schedule Of Net Periodic Benefit Costs
The net periodic benefit cost recognized for our qualified defined benefit pension plans and our retiree medical and life insurance plans each year included the following (in millions):
 
 
Qualified Defined
Benefit Pension Plans (a)
 
 
Retiree Medical and
Life Insurance Plans
 
 
2019

 
2018

 
2017

 
 
2019

 
2018

 
2017

Service cost
 
$
516

 
$
630

 
$
635

 
 
$
14

 
$
19

 
$
19

Interest cost
 
1,806

 
1,740

 
1,835

 
 
97

 
91

 
103

Expected return on plan assets
 
(2,300
)
 
(2,395
)
 
(2,249
)
 
 
(110
)
 
(135
)
 
(128
)
Recognized net actuarial losses
 
1,404

 
1,777

 
1,506

 
 
2

 
5

 
19

Amortization of net prior service (credit) cost
 
(333
)
 
(321
)
 
(355
)
 
 
42

 
15

 
15

Total net periodic benefit cost
 
$
1,093

 
$
1,431

 
$
1,372

 
 
$
45

 
$
(5
)
 
$
28

(a) 
Total net periodic benefit cost associated with our qualified defined benefit plans represents pension expense calculated in accordance with GAAP (FAS pension expense). We are required to calculate pension expense in accordance with both GAAP and CAS rules, each of which results in a different calculated amount of pension expense. The CAS pension cost is recovered through the pricing of our products and services on U.S. Government contracts and, therefore, is recognized in net sales and cost of sales for products and services. We include the difference between FAS pension service cost and CAS pension cost, referred to as the FAS/CAS operating adjustment, as a component of other unallocated, net on our consolidated statements of earnings (see Note 4 – Information on Business Segments).

Reconciliation of Benefit Obligations, Plan Assets, and Unfunded or Funded Status
The following table provides a reconciliation of benefit obligations, plan assets and unfunded status related to our qualified defined benefit pension plans and our retiree medical and life insurance plans (in millions):
 
 
Qualified Defined 
Benefit Pension Plans
 
 
Retiree Medical and
Life Insurance Plans
 
 
2019

 
2018

 
 
2019

 
2018

Change in benefit obligation
 
 
 
 
 
 
 
 
 
Beginning balance
 
$
43,305

 
$
48,686

 
 
$
2,348

 
$
2,602

Service cost
 
516

 
630

 
 
14

 
19

Interest cost
 
1,806

 
1,740

 
 
97

 
91

Benefits paid
 
(2,294
)
 
(2,379
)
 
 
(229
)
 
(224
)
Settlements
 
(1,933
)
 
(1,821
)
 
 
—

 
—

Actuarial losses (gains)
 
6,403

 
(3,281
)
 
 
(1
)
 
(311
)
Changes in longevity assumptions
 
860

 
(162
)
 
 
(70
)
 
(8
)
Plan amendments and curtailments (a)
 
11

 
(108
)
 
 
(6
)
 
101

Medicare Part D subsidy
 
—

 
—

 
 
2

 
9

Participants’ contributions
 
—

 
—

 
 
71

 
69

Ending balance
 
$
48,674

 
$
43,305

 
 
$
2,226

 
$
2,348

Change in plan assets
 
 
 
 
 
 
 
 
 
Beginning balance at fair value
 
$
32,002

 
$
33,095

 
 
$
1,644

 
$
1,883

Actual return on plan assets
 
6,667

 
(1,893
)
 
 
342

 
(94
)
Benefits paid
 
(2,294
)
 
(2,379
)
 
 
(229
)
 
(224
)
Settlements
 
(1,933
)
 
(1,821
)
 
 
—

 
—

Company contributions
 
1,000

 
5,000

 
 
59

 
1

Medicare Part D subsidy
 
—

 
—

 
 
2

 
9

Participants’ contributions
 
—

 
—

 
 
71

 
69

Ending balance at fair value
 
$
35,442

 
$
32,002

 
 
$
1,889

 
$
1,644

Unfunded status of the plans
 
$
(13,232
)
 
$
(11,303
)
 
 
$
(337
)
 
$
(704
)

(a) 
The 2018 qualified defined benefit pension plan includes a $119 million curtailment gain.
Amounts Recognized on Balance Sheets Related to Qualified Defined Benefit Pension Plans and Retiree Medical and Life Insurance Plans
The following table provides amounts recognized on our consolidated balance sheets related to our qualified defined benefit pension plans and our retiree medical and life insurance plans (in millions):
 
 
Qualified Defined 
Benefit Pension Plans
 
 
Retiree Medical and
Life Insurance Plans
 
 
2019

 
2018

 
 
2019

 
2018

Prepaid pension asset
 
$
2

 
$
107

 
 
$
—

 
$
—

Accrued postretirement benefit liabilities
 
(13,234
)
 
(11,410
)
 
 
(337
)
 
(704
)
Accumulated other comprehensive loss (pre-tax) related to:
 
 
 
 
 
 
 
 
 
Net actuarial losses
 
20,609

 
19,117

 
 
(69
)
 
236

Prior service (credit) cost
 
(1,586
)
 
(1,931
)
 
 
120

 
167

Total (a)
 
$
19,023

 
$
17,186

 
 
$
51

 
$
403

(a) 
Accumulated other comprehensive loss related to postretirement benefit plans, after-tax, of $15.5 billion and $14.3 billion at December 31, 2019 and 2018 (see “Note 12 – Stockholders’ Equity”) includes $19.0 billion ($15.0 billion, net of tax) and $17.2 billion ($13.5 billion, net of tax) for qualified defined benefit pension plans, $51 million ($39 million, net of tax) and $403 million ($316 million, net of tax) for retiree medical and life insurance plans and $667 million ($527 million, net of tax) and $542 million ($428 million, net of tax) for other plans.
Amounts Recognized in Other Comprehensive Income (Loss) Related to Postretirement Benefit Plans, Net of Tax
The following table provides the amounts recognized in other comprehensive income (loss) related to postretirement benefit plans, net of tax, for the years ended December 31, 2019, 2018 and 2017 (in millions):
 
 
Incurred but Not Yet
Recognized in Net
Periodic Benefit Cost
 
 
Recognition of
Previously
Deferred Amounts
 
 
2019

 
2018

 
2017

 
 
2019

 
2018

 
2017

 
 
Gains (losses)
 
 
(Gains) losses
Actuarial gains and losses
 
 
 
 
 
 
 
 
 
 
 
Qualified defined benefit pension plans
 
$
(2,283
)
 
$
(570
)
 
$
(1,172
)
 
 
$
1,104

 
$
1,396

 
$
974

Retiree medical and life insurance plans
 
238

 
71

 
77

 
 
2

 
4

 
12

Other plans
 
(133
)
 
83

 
(66
)
 
 
42

 
55

 
44

 
 
(2,178
)
 
(416
)
 
(1,161
)
 
 
1,148

 
1,455

 
1,030

 
 
Credit (cost)
 
 
(Credit) cost
Net prior service credit and cost
 
 
 
 
 
 
 
 
 
 
 
Qualified defined benefit pension plans
 
(8
)
 
(6
)
 
(219
)
 
 
(263
)
 
(255
)
 
(229
)
Retiree medical and life insurance plans
 
4

 
(79
)
 
—

 
 
33

 
12

 
10

Other plans
 
—

 
—

 
—

 
 
(10
)
 
(10
)
 
(9
)
 
 
(4
)
 
(85
)
 
(219
)
 
 
(240
)
 
(253
)
 
(228
)
 
 
$
(2,182
)
 
$
(501
)
 
$
(1,380
)
 
 
$
908

 
$
1,202

 
$
802
Actuarial Assumptions Used to Determine Net Periodic Benefit Cost
The actuarial assumptions used to determine the benefit obligations at December 31 of each year and to determine the net periodic benefit cost for each subsequent year, were as follows:
 
 
Qualified Defined Benefit
Pension Plans
 
 
Retiree Medical and
Life Insurance Plans
 
 
2019

 
2018

 
2017

 
 
2019

 
2018

 
2017

Weighted average discount rate
 
3.250
%
 
4.250
%
 
3.625
%
 
 
3.250
%
 
4.250
%
 
3.625
%
Expected long-term rate of return on assets
 
7.00
%
 
7.00
%
 
7.50
%
 
 
7.00
%
 
7.00
%
 
7.50
%
Health care trend rate assumed for next year
 
 
 
 
 
 
 
 
8.00
%
 
8.25
%
 
8.50
%
Ultimate health care trend rate
 
 
 
 
 
 
 
 
4.50
%
 
5.00
%
 
5.00
%
Year that the ultimate health care trend rate is reached
 
 
 
 
 
 
 
 
2034

 
2032

 
2032
Schedule of Allocation of Plan Assets
LMIMCo’s investment policies require that asset allocations of postretirement benefit plans be maintained within the following approximate ranges:
Asset Class
Asset Allocation
Ranges
Cash and cash equivalents
0-20%
Equity
15-65%
Fixed income
10-60%
Alternative investments:
 
Private equity funds
0-15%
Real estate funds
0-10%
Hedge funds
0-20%
Commodities
0-15%

Fair value measurements – The rules related to accounting for postretirement benefit plans under GAAP require certain fair value disclosures related to postretirement benefit plan assets, even though those assets are not separately presented on our consolidated balance sheets. The following table presents the fair value of the assets (in millions) of our qualified defined benefit pension plans and retiree medical and life insurance plans by asset category and their level within the fair value hierarchy, which has three levels based on the uncertainty of the inputs used to determine fair value. Level 1 refers to fair values determined based on quoted prices in active markets for identical assets, Level 2 refers to fair values estimated using significant other observable inputs and Level 3 includes fair values estimated using significant unobservable inputs. Certain other investments are measured at their Net Asset Value (NAV) per share and do not have readily determined values and are thus not subject to leveling in the fair value hierarchy. The NAV is the total value of the fund divided by the number of the fund’s shares outstanding. We recognize transfers between levels of the fair value hierarchy as of the date of the change in circumstances that causes the transfer.
 
December 31, 2019
 
 
December 31, 2018
 
Total

 
Level 1

 
Level 2

 
Level 3

 
 
Total

 
Level 1

 
Level 2

 
Level 3

Investments measured at fair value
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Cash and cash equivalents (a)
$
1,961

 
$
1,961

 
$
—

 
$
—

 
 
$
1,727

 
$
1,727

 
$
—

 
$
—

Equity (a):

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U.S. equity securities
7,189

 
7,182

 
—

 
7

 
 
3,936

 
3,927

 
3

 
6

International equity securities
7,244

 
7,217

 
23

 
4

 
 
5,406

 
5,400

 
—

 
6

Commingled equity funds
1,933

 
582

 
1,351

 
—

 
 
3,587

 
1,436

 
2,151

 
—

Fixed income (a):

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Corporate debt securities
5,208

 
—

 
5,206

 
2

 
 
4,890

 
—

 
4,888

 
2

U.S. Government securities
2,260

 
—

 
2,260

 
—

 
 
3,399

 
—

 
3,399

 
—

U.S. Government-sponsored enterprise securities
530

 
—

 
530

 
—

 
 
571

 
—

 
571

 
—

Other fixed income investments (b)
3,134

 
35

 
2,135

 
964

 
 
2,926

 
—

 
1,988

 
938

Total
$
29,459

 
$
16,977

 
$
11,505

 
$
977

 
 
$
26,442

 
$
12,490

 
$
13,000

 
$
952

Investments measured at NAV (c)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Commingled equity funds
181

 
 
 
 
 
 
 
 
144

 
 
 
 
 
 
Other fixed income investments
32

 
 
 
 
 
 
 
 
29

 
 
 
 
 
 
Private equity funds
4,019

 
 
 
 
 
 
 
 
4,014

 
 
 
 
 
 
Real estate funds
2,493

 
 
 
 
 
 
 
 
2,117

 
 
 
 
 
 
Hedge funds
1,069

 
 
 
 
 
 
 
 
828

 
 
 
 
 
 
Total investments measured at NAV
7,794

 
 
 
 
 
 
 
 
7,132

 
 
 
 
 
 
Receivables, net
78

 
 
 
 
 
 
 
 
72

 
 
 
 
 
 
Total
$
37,331

 
 
 
 
 
 
 
 
$
33,646

 
 
 
 
 
 
(a) 
Cash and cash equivalents, equity securities and fixed income securities included derivative assets and liabilities whose fair values were not material as of December 31, 2019 and 2018. LMIMCo’s investment policies restrict the use of derivatives to either establish long or short exposures for purposes consistent with applicable investment mandate guidelines or to hedge risks to the extent of a plan’s current exposure to such risks. Most derivative transactions are settled on a daily basis.
(b) 
Level 3 investments include $857 million at December 31, 2019 and $810 million at December 31, 2018 related to the buy-in contract discussed above.
(c) 
Certain investments that are valued using the NAV per share (or its equivalent) as a practical expedient have not been classified in the fair value hierarchy and are included in the table to permit reconciliation of the fair value hierarchy to the aggregate postretirement benefit plan assets.
Estimated Future Benefit Payments
The following table presents estimated future benefit payments, which reflect expected future employee service, as of December 31, 2019 (in millions):
 
 
2020

 
2021

 
2022

 
2023

 
2024

 
2025 – 2029 

Qualified defined benefit pension plans
 
$
2,300

 
$
2,360

 
$
2,450

 
$
2,530

 
$
2,600

 
$
13,540

Retiree medical and life insurance plans
 
160

 
160

 
160

 
160

 
150

 
700