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Postretirement Benefit Plans (Tables)
 12 Months Ended
Dec. 31, 2018
Retirement Benefits [Abstract]  
Schedule Of Net Periodic Benefit Costs
The net periodic benefit cost recognized each year included the following (in millions):
 
 
Qualified Defined
Benefit Pension Plans (a)
 
 
Retiree Medical and
Life Insurance Plans
 
 
2018

 
2017

 
2016

 
 
2018

 
2017

 
2016

Service cost
 
$
630

 
$
635

 
$
671

 
 
$
19

 
$
19

 
$
23

Interest cost
 
1,740

 
1,835

 
1,890

 
 
91

 
103

 
120

Expected return on plan assets
 
(2,395
)
 
(2,249
)
 
(2,539
)
 
 
(135
)
 
(128
)
 
(138
)
Recognized net actuarial losses
 
1,777

 
1,506

 
1,359

 
 
5

 
19

 
34

Amortization of net prior service (credit) cost (b)
 
(321
)
 
(355
)
 
(362
)
 
 
15

 
15

 
22

Total net periodic benefit cost
 
$
1,431

 
$
1,372

 
$
1,019

 
 
$
(5
)
 
$
28

 
$
61

(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 5 – Information on Business Segments).
(b) 
Net of the reclassification for discontinued operations presentation of pension benefits related to former IS&GS salaried employees ($14 million in 2016).
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
 
 
2018

 
2017

 
 
2018

 
2017

Change in benefit obligation
 
 
 
 
 
 
 
 
 
Beginning balance
 
$
48,686

 
$
45,064

 
 
$
2,602

 
$
2,649

Service cost
 
630

 
635

 
 
19

 
19

Interest cost
 
1,740

 
1,835

 
 
91

 
103

Benefits paid
 
(2,379
)
 
(2,310
)
 
 
(224
)
 
(232
)
Settlements
 
(1,821
)
 
—

 
 
—

 
—

Actuarial losses (gains)
 
(3,281
)
 
3,536

 
 
(311
)
 
23

Changes in longevity assumptions (a)
 
(162
)
 
(352
)
 
 
(8
)
 
(24
)
Plan amendments and curtailments (b)
 
(108
)
 
278

 
 
101

 
—

Medicare Part D subsidy
 
—

 
—

 
 
9

 
—

Participants’ contributions
 
—

 
—

 
 
69

 
64

Ending balance
 
$
43,305

 
$
48,686

 
 
$
2,348

 
$
2,602

Change in plan assets
 
 
 
 
 
 
 
 
 
Beginning balance at fair value
 
$
33,095

 
$
31,417

 
 
$
1,883

 
$
1,787

Actual return on plan assets
 
(1,893
)
 
3,942

 
 
(94
)
 
224

Benefits paid
 
(2,379
)
 
(2,310
)
 
 
(224
)
 
(232
)
Settlements
 
(1,821
)
 
—

 
 
—

 
—

Company contributions
 
5,000

 
46

 
 
1

 
40

Medicare Part D subsidy
 
—

 
—

 
 
9

 
—

Participants’ contributions
 
—

 
—

 
 
69

 
64

Ending balance at fair value
 
$
32,002

 
$
33,095

 
 
$
1,644

 
$
1,883

Unfunded status of the plans
 
$
(11,303
)
 
$
(15,591
)
 
 
$
(704
)
 
$
(719
)
(a) 
As published by the Society of Actuaries
(b) 
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
 
 
2018

 
2017

 
 
2018

 
2017

Prepaid pension asset
 
$
107

 
$
112

 
 
$
—

 
$
—

Accrued postretirement benefit liabilities
 
(11,410
)
 
(15,703
)
 
 
(704
)
 
(719
)
Accumulated other comprehensive loss (pre-tax) related to:
 
 
 
 
 
 
 
 
 
Net actuarial losses
 
19,117

 
20,169

 
 
236

 
331

Prior service (credit) cost
 
(1,931
)
 
(2,263
)
 
 
167

 
81

Total (a)
 
$
17,186

 
$
17,906

 
 
$
403

 
$
412

(a) 
Accumulated other comprehensive loss related to postretirement benefit plans, after tax, of $14.3 billion and $12.6 billion at December 31, 2018 and 2017 (see “Note 12 – Stockholders’ Equity”) includes $17.2 billion ($13.5 billion, net of tax) and $17.9 billion ($11.8 billion, net of tax) for qualified defined benefit pension plans, $403 million ($316 million, net of tax) and $412 million ($252 million, net of tax) for retiree medical and life insurance plans and $542 million ($428 million, net of tax) and $705 million ($479 million, net of tax) for other plans.
Accumulated Benefit Obligations In Excess Of Fair Value Of Plan Assets
Certain key information related to our qualified defined benefit pension plans as of December 31, 2018 and 2017 is as follows (in millions):
 
 
2018 (a)

 
2017

Plans where ABO was in excess of plan assets
 
 
 
 
Projected benefit obligation
 
$
42,444

 
$
48,628

Less: fair value of plan assets
 
31,034

 
32,925

Unfunded status of plans (b)
 
(11,410
)
 
(15,703
)
Plans where ABO was less than plan assets
 
 
 
 
Projected benefit obligation
 
51

 
58

Less: fair value of plan assets
 
158

 
170

Funded status of plans (c)
 
$
107

 
$
112

(a) 
Benefit obligation and plan assets in the table above exclude $810 million for one pension plan with plan assets valued equal to the benefit obligation.
(b) 
Represents accrued pension liabilities, which are included on our consolidated balance sheets.
(c) 
Represents prepaid pension assets, which are included on our consolidated balance sheets in other noncurrent assets.
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, 2018, 2017 and 2016 (in millions):
 
 
Incurred but Not Yet
Recognized in Net
Periodic Benefit Cost
 
 
Recognition of
Previously
Deferred Amounts
 
 
2018

 
2017

 
2016

 
 
2018

 
2017

 
2016

 
 
Gains (losses)
 
 
(Gains) losses
Actuarial gains and losses
 
 
 
 
 
 
 
 
 
 
 
Qualified defined benefit pension plans
 
$
(570
)
 
$
(1,172
)
 
$
(1,236
)
 
 
$
1,396

 
$
974

 
$
879

Retiree medical and life insurance plans
 
71

 
77

 
94

 
 
4

 
12

 
22

Other plans
 
83

 
(66
)
 
(62
)
 
 
55

 
44

 
37

 
 
(416
)
 
(1,161
)
 
(1,204
)
 
 
1,455

 
1,030

 
938

 
 
Credit (cost)
 
 
(Credit) cost (a)
Net prior service credit and cost
 
 
 
 
 
 
 
 
 
 
 
Qualified defined benefit pension plans
 
(6
)
 
(219
)
 
(54
)
 
 
(255
)
 
(229
)
 
(235
)
Retiree medical and life insurance plans
 
(79
)
 
—

 
27

 
 
12

 
10

 
14

Other plans
 
—

 
—

 
(1
)
 
 
(10
)
 
(9
)
 
(9
)
 
 
(85
)
 
(219
)
 
(28
)
 
 
(253
)
 
(228
)
 
(230
)
 
 
$
(501
)
 
$
(1,380
)
 
$
(1,232
)
 
 
$
1,202

 
$
802

 
$
708

(a) 
Reflects the reclassification for discontinued operations presentation of benefits related to former IS&GS salaried employees ($9 million in 2016). In addition, we recognized $134 million in 2016 of prior service credits from the divestiture of our IS&GS business, which were reclassified as discontinued operations.
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
 
 
2018

 
2017

 
2016

 
 
2018

 
2017

 
2016

Weighted average discount rate
 
4.250
%
 
3.625
%
 
4.125
%
 
 
4.250
%
 
3.625
%
 
4.000
%
Expected long-term rate of return on assets
 
7.00
%
 
7.50
%
 
7.50
%
 
 
7.00
%
 
7.50
%
 
7.50
%
Rate of increase in future compensation levels (for applicable bargained pension plans)
 
4.50
%
 
4.50
%
 
4.50
%
 
 
 
 
 
 
 
Health care trend rate assumed for next year
 
 
 
 
 
 
 
 
8.25
%
 
8.50
%
 
8.75
%
Ultimate health care trend rate
 
 
 
 
 
 
 
 
5.00
%
 
5.00
%
 
5.00
%
Year that the ultimate health care trend rate is reached
 
 
 
 
 
 
 
 
2032

 
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%
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, 2018
 
 
December 31, 2017
 
Total

 
Level 1

 
Level 2

 
Level 3

 
 
Total

 
Level 1

 
Level 2

 
Level 3

Investments measured at fair value
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Cash and cash equivalents (a)
$
1,727

 
$
1,727

 
$
—

 
$
—

 
 
$
1,419

 
$
1,419

 
$
—

 
$
—

Equity (a):

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U.S. equity securities
3,936

 
3,927

 
3

 
6

 
 
4,922

 
4,905

 
14

 
3

International equity securities
5,406

 
5,400

 
—

 
6

 
 
5,370

 
5,355

 
13

 
2

Commingled equity funds
3,587

 
1,436

 
2,151

 
—

 
 
4,453

 
1,493

 
2,960

 
—

Fixed income (a):

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Corporate debt securities
4,890

 
—

 
4,888

 
2

 
 
4,910

 
—

 
4,905

 
5

U.S. Government securities
3,399

 
—

 
3,399

 
—

 
 
3,775

 
—

 
3,775

 
—

U.S. Government-sponsored enterprise securities
571

 
—

 
571

 
—

 
 
817

 
—

 
817

 
—

Other fixed income investments (b)
2,926

 
—

 
1,988

 
938

 
 
2,414

 
—

 
2,403

 
11

Total
$
26,442

 
$
12,490

 
$
13,000

 
$
952

 
 
$
28,080

 
$
13,172

 
$
14,887

 
$
21

Investments measured at NAV (c)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Commingled equity funds
144

 
 
 
 
 
 
 
 
99

 
 
 
 
 
 
Other fixed income investments
29

 
 
 
 
 
 
 
 
68

 
 
 
 
 
 
Private equity funds
4,014

 
 
 
 
 
 
 
 
4,334

 
 
 
 
 
 
Real estate funds
2,117

 
 
 
 
 
 
 
 
1,611

 
 
 
 
 
 
Hedge funds
828

 
 
 
 
 
 
 
 
718

 
 
 
 
 
 
Total investments measured at NAV
7,132

 
 
 
 
 
 
 
 
6,830

 
 
 
 
 
 
Receivables, net
72

 
 
 
 
 
 
 
 
68

 
 
 
 
 
 
Total
$
33,646

 
 
 
 
 
 
 
 
$
34,978

 
 
 
 
 
 
(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, 2018 and 2017. 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 $810 million 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, 2018 (in millions):
 
 
2019

 
2020

 
2021

 
2022

 
2023

 
2024 – 2028 

Qualified defined benefit pension plans
 
$
2,350

 
$
2,390

 
$
2,470

 
$
2,550

 
$
2,610

 
$
13,670

Retiree medical and life insurance plans
 
170

 
180

 
180

 
180

 
170

 
810