NOTE 13. Pension and Postretirement Benefit Plans

3M has company-sponsored retirement plans covering substantially all U.S. employees and many employees outside the United States. In total, 3M has over 70 defined benefit plans in 26 countries. Pension benefits associated with these plans generally are based on each participant’s years of service, compensation, and age at retirement or termination. The primary U.S. defined-benefit pension plan was closed to new participants effective January 1, 2009. The Company also provides certain postretirement health care and life insurance benefits for its U.S. employees who reach retirement age while employed by the Company and were employed by the Company prior to January 1, 2016. Most international employees and retirees are covered by government health care programs. The cost of company-provided postretirement health care plans for international employees is not material and is combined with U.S. amounts in the tables that follow.

The Company has made deposits for its defined benefit plans with independent trustees. Trust funds and deposits with insurance companies are maintained to provide pension benefits to plan participants and their beneficiaries. There are no plan assets in the non-qualified plan due to its nature. For its U.S. postretirement health care and life insurance benefit plans, the Company has set aside amounts at least equal to annual benefit payments with an independent trustee.

The Company also sponsors employee savings plans under Section 401(k) of the Internal Revenue Code. These plans are offered to substantially all regular U.S. employees. For eligible employees hired prior to January 1, 2009, employee 401(k) contributions of up to 5% of eligible compensation matched in cash at rates of 45% or 60%, depending on the plan in which the employee participates. Employees hired on or after January 1, 2009, receive a cash match of 100% for employee 401(k) contributions of up to 5% of eligible compensation and receive an employer retirement income account cash contribution of 3% of the participant’s total eligible compensation. All contributions are invested in a number of investment funds pursuant to the employees’ elections. Employer contributions to the U.S. defined contribution plans were $173 million, $159 million and $139 million for 2018, 2017 and 2016, respectively. 3M subsidiaries in various international countries also participate in defined contribution plans. Employer contributions to the international defined contribution plans were $99 million, $88 million and $87 million for 2018, 2017 and 2016, respectively.

The Company adopted ASU No. 2017-07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost , effective January 1, 2018 on a retrospective basis. This ASU changed how employers that sponsor defined benefit pension and/or other postretirement benefit plans present the net periodic benefit cost in the income statement. Under the new standard, only the service cost component of net periodic benefit cost is included in operating expenses and only the service cost component is eligible for capitalization into assets such as inventory. All other net periodic benefit costs components (such as interest, expected return on plan assets, prior service cost amortization and actuarial gain/loss amortization) are reported outside of operating income. See Note 1 for additional details.

The following tables include a reconciliation of the beginning and ending balances of the benefit obligation and the fair value of plan assets as well as a summary of the related amounts recognized in the Company’s consolidated balance sheet as of December 31 of the respective years. 3M also has certain non-qualified unfunded pension and postretirement benefit plans, inclusive of plans related to supplement/excess benefits for employees impacted by particular relocations and other matters, that individually and in the aggregate are not significant and which are not included in the tables that follow. The obligations for these plans are included within other liabilities in the Company’s consolidated balance sheet and aggregated less than $40 million as of December 31, 2018 and 2017.

2017
	Qualified and Non-qualified
	Pension Benefits								Postretirement
	United States				International				Benefits
(Millions)	2018		2017		2018		2017		2018		2017
Change in benefit obligation
Benefit obligation at beginning of year	$	17,360	$	16,202	$	7,502	$	6,625	$	2,410	$	2,259
Acquisitions/Transfers		—		—		(11)		3		—		—
Service cost		288		268		143		142		52		52
Interest cost		563		565		157		157		79		80
Participant contributions		—		—		9		8		—		—
Foreign exchange rate changes		—		—		(387)		667		(13)		3
Plan amendments		—		—		7		6		—		(6)
Actuarial (gain) loss		(1,226)		1,263		(144)		170		(244)		127
Benefit payments		(1,034)		(936)		(304)		(276)		(109)		(105)
Settlements, curtailments, special termination benefits and other		(3)		(2)		(7)		—		—		—
Benefit obligation at end of year	$	15,948	$	17,360	$	6,965	$	7,502	$	2,175	$	2,410
Change in plan assets
Fair value of plan assets at beginning of year	$	15,686	$	14,081	$	6,737	$	5,617	$	1,397	$	1,356
Acquisitions/Transfers		(4)		—		—		2		—		—
Actual return on plan assets		(95)		1,693		(38)		714		(32)		143
Company contributions		254		852		112		112		4		3
Participant contributions		—		—		9		8		—		—
Foreign exchange rate changes		—		—		(346)		560		—		—
Benefit payments		(1,034)		(936)		(304)		(276)		(109)		(105)
Settlements, curtailments, special termination benefits and other		(4)		(4)		—		—		—		—
Fair value of plan assets at end of year	$	14,803	$	15,686	$	6,170	$	6,737	$	1,260	$	1,397
Funded status at end of year	$	(1,145)	$	(1,674)	$	(795)	$	(765)	$	(915)	$	(1,013)


	Qualified and Non-qualified
	Pension Benefits								Postretirement
	United States				International				Benefits
(Millions)	2018		2017		2018		2017		2018		2017
Amounts recognized in the Consolidated Balance Sheet as of Dec. 31,
Non-current assets	$	—	$	4	$	208	$	233	$	—	$	—
Accrued benefit cost
Current liabilities		(60)		(53)		(13)		(12)		(3)		(4)
Non-current liabilities		(1,085)		(1,625)		(990)		(986)		(912)		(1,009)
Ending balance	$	(1,145)	$	(1,674)	$	(795)	$	(765)	$	(915)	$	(1,013)


	Qualified and Non-qualified
	Pension Benefits								Postretirement
	United States				International				Benefits
(Millions)	2018		2017		2018		2017		2018		2017
Amounts recognized in accumulated other comprehensive income as of Dec. 31,
Net actuarial loss (gain)	$	5,374	$	5,921	$	1,713	$	1,720	$	584	$	774
Prior service cost (credit)		(152)		(175)		(20)		(40)		(123)		(163)
Ending balance	$	5,222	$	5,746	$	1,693	$	1,680	$	461	$	611

The balance of amounts recognized for international plans in accumulated other comprehensive income as of December 31 in the preceding table are presented based on the foreign currency exchange rate on that date.

The pension accumulated benefit obligation represents the actuarial present value of benefits based on employee service and compensation as of the measurement date and does not include an assumption about future compensation levels. The accumulated benefit obligation of the U.S. pension plans was $15.033 billion and $16.270 billion at December 31, 2018 and 2017, respectively. The accumulated benefit obligation of the international pension plans was $6.438 billion and $6.870 billion at December 31, 2018 and 2017, respectively.

The following amounts relate to pension plans with accumulated benefit obligations in excess of plan assets as of December 31:


	Qualified and Non-qualified Pension Plans
	United States				International
(Millions)	2018		2017		2018		2017
Projected benefit obligation	$	593	$	17,350	$	2,613	$	2,687
Accumulated benefit obligation		521		16,260		2,415		2,449
Fair value of plan assets		9		15,671		1,633		1,731

Components of net periodic cost and other amounts recognized in other comprehensive income

The service cost component of defined benefit net periodic benefit cost is recorded in cost of sales, selling, general and administrative expenses, and research, development and related expenses. As discussed in Note 6, the other components of net periodic benefit cost are reflected in other expense (income), net. Components of net periodic benefit cost and other supplemental information for the years ended December 31 follow:



	Qualified and Non-qualified
	Pension Benefits												Postretirement
	United States						International						Benefits
(Millions)	2018		2017		2016		2018		2017		2016		2018		2017		2016
Net periodic benefit cost (benefit)
Operating expense
Service cost	$	288	$	268	$	259	$	143	$	142	$	133	$	52	$	52	$	54
Non-operating expense
Interest cost		563		565		575		157		157		171		79		80		79
Expected return on plan assets		(1,087)		(1,035)		(1,043)		(307)		(292)		(309)		(84)		(86)		(90)
Amortization of transition asset		—		—		—		—		—		(1)		—		—		—
Amortization of prior service benefit		(23)		(23)		(24)		(13)		(13)		(13)		(40)		(53)		(55)
Amortization of net actuarial loss		503		388		354		114		126		91		61		56		61
Settlements, curtailments, special termination benefits and other		—		2		4		4		4		4		—		(4)		—
Total non-operating expense (benefit)		(44)		(103)		(134)		(45)		(18)		(57)		16		(7)		(5)
Total net periodic benefit cost (benefit)	$	244	$	165	$	125	$	98	$	124	$	76	$	68	$	45	$	49
Other changes in plan assets and benefit obligations recognized in other comprehensive (income) loss
Amortization of transition asset		—		—		—		—		—		1		—		—		—
Prior service cost (benefit)		—		—		5		7		6		(5)		—		(1)		—
Amortization of prior service benefit		23		23		24		13		13		13		40		53		55
Net actuarial (gain) loss		(44)		605		692		190		(248)		512		(127)		69		8
Amortization of net actuarial loss		(503)		(388)		(354)		(114)		(126)		(91)		(61)		(56)		(61)
Foreign currency		—		—		—		(83)		167		(93)		(2)		—		—
Total recognized in other comprehensive (income) loss	$	(524)	$	240	$	367	$	13	$	(188)	$	337	$	(150)	$	65	$	2
Total recognized in net periodic benefit cost (benefit) and other comprehensive (income) loss	$	(280)	$	405	$	492	$	111	$	(64)	$	413	$	(82)	$	110	$	51

Weighted-average assumptions used to determine benefit obligations as of December 31


	Qualified and Non-qualified Pension Benefits												Postretirement
	United States						International						Benefits
	2018		2017		2016		2018		2017		2016		2018		2017		2016

Discount rate	4.36	%	3.68	%	4.21	%	2.50	%	2.41	%	2.54	%	4.41	%	3.79	%	4.26	%
Compensation rate increase	4.10	%	4.10	%	4.10	%	2.89	%	2.89	%	2.90	%	N/A		N/A		N/A

Weighted-average assumptions used to determine net cost for years ended December 31


	Qualified and Non-qualified Pension Benefits												Postretirement
	United States						International						Benefits
	2018		2017		2016		2018		2017		2016		2018		2017		2016

Discount rate - service cost	3.78	%	4.42	%	4.70	%	2.27	%	2.32	%	2.84	%	3.86	%	4.50	%	4.70	%
Discount rate - interest cost	3.35	%	3.61	%	3.73	%	2.14	%	2.25	%	2.72	%	3.52	%	3.80	%	3.80	%
Expected return on assets	7.25	%	7.25	%	7.50	%	5.02	%	5.16	%	5.77	%	6.53	%	6.48	%	6.91	%
Compensation rate increase	4.10	%	4.10	%	4.10	%	2.89	%	2.90	%	2.90	%	N/A		N/A		N/A

The Company provides eligible retirees in the U.S. postretirement health care benefit plans to a savings account benefits-based plan. The contributions provided by the Company to the health savings accounts increase 3 percent per year for employees who retired prior to January 1, 2016 and increase 1.5 percent for employees who retire on or after January 1, 2016. Therefore, the Company no longer has material exposure to health care cost inflation.

The Company determines the discount rate used to measure plan liabilities as of the December 31 measurement date for the pension and postretirement benefit plans, which is also the date used for the related annual measurement assumptions. The discount rate reflects the current rate at which the associated liabilities could be effectively settled at the end of the year. The Company sets its rate to reflect the yield of a portfolio of high quality, fixed-income debt instruments that would produce cash flows sufficient in timing and amount to settle projected future benefits. Using this methodology, the Company determined a discount rate of 4.36% for the U.S. pension plans and 4.41% for the postretirement benefit plans as of December 31, 2018, which is an increase of 0.68 percentage points and 0.62 percentage points, respectively, from the rates used as of December 31, 2017. An increase in the discount rate lowers the Projected Benefit Obligation (PBO), the significant increase in the discount rate as of December 31, 2018 resulted in an approximately $1.2 billion lower PBO for the U.S. pension plans. For the international pension and postretirement plans the discount rates also reflect the current rate at which the associated liabilities could be effectively settled at the end of the year. If the country has a deep market in corporate bonds the Company matches the expected cash flows from the plan either to a portfolio of bonds that generate sufficient cash flow or a notional yield curve generated from available bond information. In countries that do not have a deep market in corporate bonds, government bonds are considered with a risk premium to approximate corporate bond yields.

The Company measures service cost and interest cost separately using the spot yield curve approach applied to each corresponding obligation. Service costs are determined based on duration-specific spot rates applied to the service cost cash flows. The interest cost calculation is determined by applying duration-specific spot rates to the year-by-year projected benefit payments. The spot yield curve approach does not affect the measurement of the total benefit obligations as the change in service and interest costs offset in the actuarial gains and losses recorded in other comprehensive income.

For the primary U.S. qualified pension plan, the Company’s assumption for the expected return on plan assets was 7.25% in 2018. Projected returns are based primarily on broad, publicly traded equity and fixed-income indices and forward-looking estimates of active portfolio and investment management. As of December 31, 2018, the Company’s 2019 expected long-term rate of return on U.S. plan assets is 7.00%. The expected return assumption is based on the strategic asset allocation of the plan, long term capital market return expectations and expected performance from active investment management. The 2018 expected long-term rate of return is based on an asset allocation assumption of 23% global equities, 14% private equities, 47% fixed-income securities, and 16% absolute return investments independent of traditional performance benchmarks, along with positive returns from active investment management. The actual net rate of return on plan assets in 2018 was -0.5%. In 2017 the plan earned a rate of return of 12.4% and in 2016 earned a return of 5.8%. The average annual actual return on the plan assets over the past 10 and 25 years has been 8.6% and 8.7%, respectively. Return on assets assumptions for international pension and other post-retirement benefit plans are calculated on a plan-by-plan basis using plan asset allocations and expected long-term rate of return assumptions.

The Company converted to the “RP 2014 Mortality Tables” and updated the mortality improvement scales annually to the Society of Actuaries Scale MP-2016, Scale MP-2017 and Scale MP-2018. The December 31, 2018 update resulted in a small decrease to the U.S. pension PBO and U.S. accumulated postretirement benefit obligations.

During 2018, the Company contributed $366 million to its U.S. and international pension plans and $4 million to its postretirement plans. During 2017, the Company contributed $964 million to its U.S. and international pension plans and $3 million to its postretirement plans. In 2019, the Company expects to contribute an amount in the range of $100 million to $200 million of cash to its U.S. and international retirement plans. The Company does not have a required minimum cash pension contribution obligation for its U.S. plans in 2019. Future contributions will depend on market conditions, interest rates and other factors.

Future Pension and Postretirement Benefit Payments

The following table provides the estimated pension and postretirement benefit payments that are payable from the plans to participants.


	Qualified and Non-qualified
	Pension Benefits				Postretirement
(Millions)	United States		International		Benefits
2019 Benefit Payments	$	1,094	$	240	$	122
2020 Benefit Payments		1,097		242		130
2021 Benefit Payments		1,105		258		139
2022 Benefit Payments		1,117		269		147
2023 Benefit Payments		1,130		289		157
Next five years		5,683		1,623		842

Plan Asset Management

3M’s investment strategy for its pension and postretirement plans is to manage the funds on a going-concern basis. The primary goal of the trust funds is to meet the obligations as required. The secondary goal is to earn the highest rate of return possible, without jeopardizing its primary goal, and without subjecting the Company to an undue amount of contribution risk. Fund returns are used to help finance present and future obligations to the extent possible within actuarially determined funding limits and tax-determined asset limits, thus reducing the potential need for additional contributions from 3M. The investment strategy has used long duration cash bonds and derivative instruments to offset a significant portion of the interest rate sensitivity of U.S. pension liabilities.

Normally, 3M does not buy or sell any of its own securities as a direct investment for its pension and other postretirement benefit funds. However, due to external investment management of the funds, the plans may indirectly buy, sell or hold 3M securities. The aggregate amount of 3M securities are not considered to be material relative to the aggregate fund percentages.

The discussion that follows references the fair value measurements of certain assets in terms of levels 1, 2 and 3. See Note 15 for descriptions of these levels. While the company believes the valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different estimate of fair value at the reporting date.

U.S. Pension Plans and Postretirement Benefit Plan Assets

In order to achieve the investment objectives in the U.S. pension plans and U.S. postretirement benefit plans, the investment policies include a target strategic asset allocation. The investment policies allow some tolerance around the target in recognition that market fluctuations and illiquidity of some investments may cause the allocation to a specific asset class to vary from the target allocation, potentially for long periods of time. Acceptable ranges have been designed to allow for deviation from strategic targets and to allow for the opportunity for tactical over- and under-weights. The portfolios will normally be rebalanced when the quarter-end asset allocation deviates from acceptable ranges. The allocation is reviewed regularly by the named fiduciary of the plans. Approximately 50% of the postretirement benefit plan assets are in a 401(h) account. The 401(h) account assets are in the same trust as the primary U.S. pension plan and invested with the same investment objectives as the primary U.S. pension plan.

The fair values of the assets held by the U.S. pension plans by asset class are as follows:


	Fair Value Measurements Using Inputs Considered as												Fair Value at
(Millions)	Level 1				Level 2				Level 3				Dec. 31,
Asset Class	2018		2017		2018		2017		2018		2017		2018		2017
Equities
U.S. equities	$	1,369	$	1,568	$	—	$	—	$	—	$	—	$	1,369	$	1,568
Non-U.S. equities		1,234		1,527		—		—		—		—		1,234		1,527
Index and long/short equity funds*														372		422
Total Equities	$	2,603	$	3,095	$	—	$	—	$	—	$	—	$	2,975	$	3,517
Fixed Income
U.S. government securities	$	1,889	$	2,666	$	732	$	484	$	—	$	—	$	2,621	$	3,150
Non-U.S. government securities		—		—		44		168		—		—		44		168
Preferred and convertible securities		—		4		44		2		—		—		44		6
U.S. corporate bonds		9		10		2,941		2,904		—		—		2,950		2,914
Non-U.S. corporate bonds		—		—		475		614		—		—		475		614
Derivative instruments		2		—		111		110		—		—		113		110
Other*														9		8
Total Fixed Income	$	1,900	$	2,680	$	4,347	$	4,282	$	—	$	—	$	6,256	$	6,970
Private Equity
Derivative instruments	$	—	$	—	$	—	$	—	$	—	$	(7)	$	—	$	(7)
Growth equity		45		34		—		—		—		—		45		34
Partnership investments*														2,064		2,062
Total Private Equity	$	45	$	34	$	—	$	—	$	—	$	(7)	$	2,109	$	2,089
Absolute Return
Fixed income and other	$	28	$	31	$	114	$	102	$	—	$	—	$	142	$	133
Hedge fund/fund of funds*														1,866		1,871
Partnership investments*														429		335
Total Absolute Return	$	28	$	31	$	114	$	102	$	—	$	—	$	2,437	$	2,339
Cash and Cash Equivalents
Cash and cash equivalents	$	412	$	109	$	4	$	14	$	—	$	1	$	416	$	124
Repurchase agreements and derivative margin activity		—		—		(1)		(502)		—		—		(1)		(502)
Cash and cash equivalents, valued at net asset value*														870		1,402
Total Cash and Cash Equivalents	$	412	$	109	$	3	$	(488)	$	—	$	1	$	1,285	$	1,024
Total	$	4,988	$	5,949	$	4,464	$	3,896	$	—	$	(6)	$	15,062	$	15,939
Other items to reconcile to fair value of plan assets													$	(259)	$	(253)
Fair value of plan assets													$	14,803	$	15,686

* In accordance with ASC 820-10, certain investments that are measured at fair value using the net asset value (NAV) per share (or its equivalent) as a practical expedient have not been classified in the fair value hierarchy. The NAV is based on the fair value of the underlying assets owned by the fund, minus its liabilities then divided by the number of units outstanding and is determined by the investment manager or custodian of the fund. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the fair value of plan assets.

The fair values of the assets held by the postretirement benefit plans by asset class are as follows:


	Fair Value Measurements Using Inputs Considered as												Fair Value at
(Millions)	Level 1				Level 2				Level 3				Dec. 31,
Asset Class	2018		2017		2018		2017		2018		2017		2018		2017
Equities
U.S. equities	$	356	$	465	$	—	$	—	$	—	$	—	$	356	$	465
Non-U.S. equities		58		71		—		—		—		—		58		71
Index and long/short equity funds*														34		45
Total Equities	$	414	$	536	$	—	$	—	$	—	$	—	$	448	$	581
Fixed Income
U.S. government securities	$	112	$	136	$	213	$	205	$	—	$	—	$	325	$	341
Non-U.S. government securities		—		—		4		9		—		—		4		9
U.S. corporate bonds		—		—		162		159		—		—		162		159
Non-U.S. corporate bonds		—		—		32		35		—		—		32		35
Derivative instruments		—		—		5		4		—		—		5		4
Total Fixed Income	$	112	$	136	$	416	$	412	$	—	$	—	$	528	$	548
Private Equity
Growth equity	$	2	$	2	$	—	$	—	$	—	$	—	$	2	$	2
Partnership investments*														101		109
Total Private Equity	$	2	$	2	$	—	$	—	$	—	$	—	$	103	$	111
Absolute Return
Fixed income and other	$	1	$	1	$	5	$	4	$	—	$	—	$	6	$	5
Hedge fund/fund of funds*														80		76
Partnership investments*														18		14
Total Absolute Return	$	1	$	1	$	5	$	4	$	—	$	—	$	104	$	95
Cash and Cash Equivalents
Cash and cash equivalents	$	47	$	34	$	5	$	1	$	—	$	—	$	52	$	35
Repurchase agreements and derivative margin activity		—		—		—		(20)		—		—		—		(20)
Cash and cash equivalents, valued at net asset value*														37		57
Total Cash and Cash Equivalents	$	47	$	34	$	5	$	(19)	$	—	$	—	$	89	$	72
Total	$	576	$	709	$	426	$	397	$	—	$	—	$	1,272	$	1,407
Other items to reconcile to fair value of plan assets													$	(12)	$	(10)
Fair value of plan assets													$	1,260	$	1,397

*In accordance with ASC 820-10, certain investments that are measured at fair value using the NAV per share (or its equivalent) as a practical expedient have not been classified in the fair value hierarchy. The NAV is based on the fair value of the underlying assets owned by the fund, minus its liabilities then divided by the number of units outstanding and is determined by the investment manager or custodian of the fund. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the fair value of plan assets.

Publicly traded equities are valued at the closing price reported in the active market in which the individual securities are traded.

Fixed income includes derivative instruments such as credit default swaps, interest rate swaps and futures contracts. Corporate debt includes bonds and notes, asset backed securities, collateralized mortgage obligations and private placements. Swaps and derivative instruments are valued by the custodian using closing market swap curves and market derived inputs. U.S. government and government agency bonds and notes are valued at the closing price reported in the active market in which the individual security is traded. Corporate bonds and notes, asset backed securities and collateralized mortgage obligations are valued at either the yields currently available on comparable securities of issuers with similar credit ratings or valued under a discounted cash flow approach that utilizes observable inputs, such as current yields of similar instruments, but includes adjustments for certain risks that may not be observable such as credit and liquidity risks. Private placements are valued by the custodian using recognized pricing services and sources.

The private equity portfolio is a diversified mix of derivative instruments, growth equity and partnership interests. Derivative investments are written options that are valued by independent parties using market inputs and valuation models. Growth equity investments are valued at the closing price reported in the active market in which the individual securities are traded.

Absolute return consists primarily of partnership interests in hedge funds, hedge fund of funds or other private fund vehicles. Corporate debt instruments are valued at either the yields currently available on comparable securities of issuers with similar credit ratings or valued under a discounted cash flow approach that utilizes observable inputs, such as current yields of similar instruments, but includes adjustments for certain risks that may not be observable such as credit and liquidity risk ratings.

Other items to reconcile to fair value of plan assets include, interest receivables, amounts due for securities sold, amounts payable for securities purchased and interest payable.

The balances of and changes in the fair values of the U.S. pension plans’ and postretirement plans’ level 3 assets for the periods ended December 31, 2018 and 2017 were not material.

International Pension Plans Assets

Outside the U.S., pension plan assets are typically managed by decentralized fiduciary committees. The disclosure below of asset categories is presented in aggregate for over 65 defined benefit plans in 25 countries; however, there is significant variation in asset allocation policy from country to country. Local regulations, local funding rules, and local financial and tax considerations are part of the funding and investment allocation process in each country. The Company provides standard funding and investment guidance to all international plans with more focused guidance to the larger plans.

Each plan has its own strategic asset allocation. The asset allocations are reviewed periodically and rebalanced when necessary.

The fair values of the assets held by the international pension plans by asset class are as follows:


	Fair Value Measurements Using Inputs Considered as												Fair Value at
(Millions)	Level 1				Level 2				Level 3				Dec. 31,
Asset Class	2018		2017		2018		2017		2018		2017		2018		2017
Equities
Growth equities	$	460	$	659	$	248	$	289	$	—	$	—	$	708	$	948
Value equities		446		597		42		43		—		—		488		640
Core equities		55		62		742		790		5		4		802		856
Equities, valued at net asset value*														16		21
Total Equities	$	961	$	1,318	$	1,032	$	1,122	$	5	$	4	$	2,014	$	2,465
Fixed Income
Domestic government	$	334	$	362	$	351	$	256	$	5	$	4	$	690	$	622
Foreign government		150		168		321		338		—		—		471		506
Corporate debt securities		56		63		993		1,072		9		10		1,058		1,145
Fixed income securities, valued at net asset value*														961		976
Total Fixed Income	$	540	$	593	$	1,665	$	1,666	$	14	$	14	$	3,180	$	3,249
Private Equity
Real estate	$	5	$	36	$	75	$	74	$	4	$	3	$	84	$	113
Real estate, valued at net asset value*														37		36
Partnership investments*														89		68
Total Private Equity	$	5	$	36	$	75	$	74	$	4	$	3	$	210	$	217
Absolute Return
Derivatives	$	1	$	—	$	1	$	2	$	—	$	—	$	2	$	2
Insurance		—		—		—		—		496		519		496		519
Other		—		—		33		—		8		7		41		7
Other, valued at net asset value*														—		1
Hedge funds*														186		194
Total Absolute Return	$	1	$	—	$	34	$	2	$	504	$	526	$	725	$	723
Cash and Cash Equivalents
Cash and cash equivalents	$	71	$	67	$	22	$	34	$	—	$	—	$	93	$	101
Cash and cash equivalents, valued at net asset value*														1		3
Total Cash and Cash Equivalents	$	71	$	67	$	22	$	34	$	—	$	—	$	94	$	104
Total	$	1,578	$	2,014	$	2,828	$	2,898	$	527	$	547	$	6,223	$	6,758
Other items to reconcile to fair value of plan assets													$	(53)	$	(21)
Fair value of plan assets													$	6,170	$	6,737

Equities consist primarily of mandates in public equity securities managed to various public equity indices. Publicly traded equities are valued at the closing price reported in the active market in which the individual securities are traded.

Fixed Income investments include domestic and foreign government, and corporate, (including mortgage backed and other debt) securities. Governments, corporate bonds and notes and mortgage backed securities are valued at the closing price reported if traded on an active market or at yields currently available on comparable securities of issuers with similar credit ratings or valued under a discounted cash flow approach that utilizes observable inputs, such as current yields of similar instruments, but includes adjustments for certain risks that may not be observable such as credit and liquidity risks.

Private equity funds consist of partnership interests in a variety of funds. Real estate consists of property funds and REITS (Real Estate Investment Trusts). REITS are valued at the closing price reported in the active market in which it is traded.

Absolute return consists of private partnership interests in hedge funds, insurance contracts, derivative instruments, hedge fund of funds, and other alternative investments. Insurance consists of insurance contracts, which are valued using cash surrender values which is the amount the plan would receive if the contract was cashed out at year end. Derivative instruments consist of interest rate swaps that are used to help manage risks.

Other items to reconcile to fair value of plan assets include the net of interest receivables, amounts due for securities sold, amounts payable for securities purchased and interest payable.

The balances of and changes in the fair values of the international pension plans’ level 3 assets consist primarily of insurance contracts under the absolute return asset class. The aggregate of net purchases and net unrealized gains decreased this balance by $11million in 2018 and increased this balance by $48 million in 2017. Foreign currency exchange impacts decreased this balance by $13 million and increased this balance by $16 million in 2017.