Employee Benefit Plans

Pension and other postretirement benefit plans

The Company has noncontributory defined benefit pension plans and other postretirement benefit plans for certain eligible employees. The Company uses a measurement date of December 31 for all of its pension and postretirement benefit plans.

Defined pension plan benefits to all nonunion and certain union employees hired after December 31, 2005, were discontinued. Employees that would have been eligible for defined pension plan benefits are eligible to receive additional defined contribution plan benefits. Effective January 1, 2010, all benefit and service accruals for nonunion and certain union plans were frozen. Effective June 30, 2011 and September 30, 2012, all benefit and service accruals for certain additional union employees were frozen. These employees will be eligible to receive additional defined contribution plan benefits.

Effective January 1, 2010, eligibility to receive retiree medical benefits was modified at certain of the Company's businesses. Employees who attain age 55 with 10 years of continuous service by December 31, 2010, will be provided the current retiree medical insurance benefits or can elect the new benefit, if desired, regardless of when they retire. All other current employees must meet the new eligibility criteria of age 60 and 10 years of continuous service at the time they retire. These employees will be eligible for a specified company funded Retiree Reimbursement Account. Employees hired after December 31, 2009, will not be eligible for retiree medical benefits.

In 2012, the Company modified health care coverage for certain retirees. Effective January 1, 2013, post-65 coverage is replaced by a fixed-dollar subsidy for retirees and spouses to be used to purchase individual insurance through an exchange.

Changes in benefit obligation and plan assets for the years ended December 31, 2012 and 2011, and amounts recognized in the Consolidated Balance Sheets at December 31, 2012 and 2011, were as follows:



	Pension Benefits						Other Postretirement Benefits
	2012			2011			2012			2011
	(In thousands)
Change in benefit obligation:
Benefit obligation at beginning of year	$	435,618		$	388,589		$	110,689		$	91,286
Service cost	1,078			2,252			1,747			1,443
Interest cost	17,598			19,500			4,166			4,700
Plan participants' contributions	—			—			2,688			2,644
Amendments	—			—			(11,418		)	—
Actuarial loss	30,939			62,722			3,469			17,940
Curtailment gain	—			(13,939		)	—			—
Benefits paid	(26,122		)	(23,506		)	(7,983		)	(7,324		)
Benefit obligation at end of year	459,111			435,618			103,358			110,689
Change in net plan assets:
Fair value of plan assets at beginning of year	278,000			277,598			68,085			70,610
Actual gain (loss) on plan assets	34,493			(4,718		)	6,497			(872		)
Employer contribution	22,813			28,626			5,074			3,027
Plan participants' contributions	—			—			2,688			2,644
Benefits paid	(26,122		)	(23,506		)	(7,983		)	(7,324		)
Fair value of net plan assets at end of year	309,184			278,000			74,361			68,085
Funded status - under	$	(149,927	)	$	(157,618	)	$	(28,997	)	$	(42,604	)
Amounts recognized in the Consolidated Balance Sheets at December 31:
Other accrued liabilities (current)	$	—		$	—		$	(655	)	$	(550	)
Other liabilities (noncurrent)	(149,927		)	(157,618		)	(28,342		)	(42,054		)
Net amount recognized	$	(149,927	)	$	(157,618	)	$	(28,997	)	$	(42,604	)
Amounts recognized in accumulated other comprehensive (income) loss consist of:
Actuarial loss	$	202,406		$	189,494		$	43,589		$	43,861
Prior service cost (credit)	437			(632		)	(18,594		)	(8,615		)
Transition obligation	—			—			—			2,128
Total	$	202,843		$	188,862		$	24,995		$	37,374

Employer contributions and benefits paid in the preceding table include only those amounts contributed directly to, or paid directly from, plan assets. Accumulated other comprehensive (income) loss in the above table includes amounts related to regulated operations, which are recorded as regulatory assets (liabilities) and are expected to be reflected in rates charged to customers over time. For more information on regulatory assets (liabilities) see Note 6.

Unrecognized pension actuarial losses in excess of 10 percent of the greater of the projected benefit obligation or the market-related value of assets are amortized on a straight-line basis over the expected average remaining service lives of active participants for non-frozen plans and over the average life expectancy of plan participants for frozen plans. The market-related value of assets is determined using a five-year average of assets. Unrecognized postretirement net transition obligation was amortized over a 20-year period ending 2012.

The projected benefit obligation, accumulated benefit obligation and fair value of plan assets for the pension plans, of which all have accumulated benefit obligations in excess of plan assets, at December 31 were as follows:



	2012		2011
	(In thousands)
Projected benefit obligation	$	459,111	$	435,618
Accumulated benefit obligation	$	459,111	$	435,618
Fair value of plan assets	$	309,184	$	278,000

Components of net periodic benefit cost for the Company's pension and other postretirement benefit plans for the years ended December 31 were as follows:



	Pension Benefits									Other Postretirement Benefits
	2012			2011			2010			2012			2011			2010
	(In thousands)
Components of net periodic benefit cost:
Service cost	$	1,078		$	2,252		$	2,889		$	1,747		$	1,443		$	1,357
Interest cost	17,598			19,500			19,761			4,166			4,700			4,817
Expected return on assets	(23,536		)	(22,809		)	(23,643		)	(4,890		)	(5,051		)	(5,512		)
Amortization of prior service cost (credit)	(46		)	45			152			(1,438		)	(2,677		)	(3,303		)
Recognized net actuarial loss	7,070			4,656			2,622			2,134			753			845
Curtailment loss (gain)	(1,023		)	1,218			—			—			—			—
Amortization of net transition obligation	—			—			—			2,128			2,125			2,125
Net periodic benefit cost, including amount capitalized	1,141			4,862			1,781			3,847			1,293			329
Less amount capitalized	937			1,196			791			910			(50		)	(92		)
Net periodic benefit cost	204			3,666			990			2,937			1,343			421
Other changes in plan assets and benefit obligations recognized in accumulated other comprehensive (income) loss:
Net loss	19,982			76,310			20,477			1,863			23,863			1,462
Prior service cost (credit)	—			—			353			(11,418		)	—			121
Amortization of actuarial loss	(7,070		)	(4,656		)	(2,622		)	(2,134		)	(753		)	(845		)
Amortization of prior service (cost) credit	1,069			(1,263		)	(152		)	1,438			2,677			3,303
Amortization of net transition obligation	—			—			—			(2,128		)	(2,125		)	(2,125		)
Total recognized in accumulated other comprehensive (income) loss	13,981			70,391			18,056			(12,379		)	23,662			1,916
Total recognized in net periodic benefit cost and accumulated other comprehensive (income) loss	$	14,185		$	74,057		$	19,046		$	(9,442	)	$	25,005		$	2,337

The estimated net loss and prior service cost for the defined benefit pension plans that will be amortized from accumulated other comprehensive loss into net periodic benefit cost in 2013 are $7.1 million and $71,000, respectively. The estimated net loss and prior service credit for the other postretirement benefit plans that will be amortized from accumulated other comprehensive loss into net periodic benefit cost in 2013 are $2.6 million and $1.5 million, respectively.

Weighted average assumptions used to determine benefit obligations at December 31 were as follows:



	Pension Benefits				Other Postretirement Benefits
	2012		2011		2012		2011
Discount rate	3.65	%	4.16	%	3.67	%	4.13	%
Expected return on plan assets	7.00	%	7.75	%	6.00	%	6.75	%
Rate of compensation increase	N/A		N/A		4.00	%	4.00	%

Weighted average assumptions used to determine net periodic benefit cost for the years ended December 31 were as follows:



	Pension Benefits					Other Postretirement Benefits
	2012		2011			2012		2011
Discount rate	4.16	%	5.26	%		4.13	%	5.21	%
Expected return on plan assets	7.75	%	7.75	%		6.75	%	6.75	%
Rate of compensation increase	N/A*		4.00	%	/N/A*	4.00	%	4.00	%

* Effective June 30, 2011 and September 30, 2012, all benefit and service accruals for a union plan were frozen. Compensation increases had previously been frozen for all other plans.

The expected rate of return on pension plan assets is based on the targeted asset allocation range of 60 percent to 70 percent equity securities and 30 percent to 40 percent fixed-income securities and the expected rate of return from these asset categories. The expected rate of return on other postretirement plan assets is based on the targeted asset allocation range of 65 percent to 75 percent equity securities and 25 percent to 35 percent fixed-income securities and the expected rate of return from these asset categories. The expected return on plan assets for other postretirement benefits reflects insurance-related investment costs.

Health care rate assumptions for the Company's other postretirement benefit plans as of December 31 were as follows:



				2012					2011
Health care trend rate assumed for next year	6.0	%	-	8.0	%	6.0	%	-	8.0	%
Health care cost trend rate - ultimate	5.0	%	-	6.0	%	5.0	%	-	6.0	%
Year in which ultimate trend rate achieved				2017					2017

The Company's other postretirement benefit plans include health care and life insurance benefits for certain retirees. The plans underlying these benefits may require contributions by the retiree depending on such retiree's age and years of service at retirement or the date of retirement. The accounting for the health care plans anticipates future cost-sharing changes that are consistent with the Company's expressed intent to generally increase retiree contributions each year by the excess of the expected health care cost trend rate over six percent.

Assumed health care cost trend rates may have a significant effect on the amounts reported for the health care plans. A one percentage point change in the assumed health care cost trend rates would have had the following effects at December 31, 2012:



	1 Percentage Point Increase		1 Percentage Point Decrease
	(In thousands)
Effect on total of service and interest cost components	$	340	$	(278	)
Effect on postretirement benefit obligation	$	5,724	$	(4,858	)

The Company's pension assets are managed by 14 outside investment managers. The Company's other postretirement assets are managed by one outside investment manager. The Company's investment policy with respect to pension and other postretirement assets is to make investments solely in the interest of the participants and beneficiaries of the plans and for the exclusive purpose of providing benefits accrued and defraying the reasonable expenses of administration. The Company strives to maintain investment diversification to assist in minimizing the risk of large losses. The Company's policy guidelines allow for investment of funds in cash equivalents, fixed-income securities and equity securities. The guidelines prohibit investment in commodities and futures contracts, equity private placement, employer securities, leveraged or derivative securities, options, direct real estate investments, precious metals, venture capital and limited partnerships. The guidelines also prohibit short selling and margin transactions. The Company's practice is to periodically review and rebalance asset categories based on its targeted asset allocation percentage policy.

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability (an exit price) in an orderly transaction between market participants at the measurement date. The ASC establishes a hierarchy for grouping assets and liabilities, based on the significance of inputs.

The estimated fair values of the Company's pension plan assets are determined using the market approach.

The carrying value of the pension plans' Level 1 and Level 2 cash equivalents approximates fair value and is determined using observable inputs in active markets or the net asset value of shares held at year end, which is determined using other observable inputs including pricing from outside sources. Units of this fund can be redeemed on a daily basis at their net asset value and have no redemption restrictions. The assets are invested in high quality, short-term instruments of domestic and foreign issuers.

The estimated fair value of the pension plans' Level 1 equity securities is based on the closing price reported on the active market on which the individual securities are traded.

The estimated fair value of the pension plans' Level 1 and Level 2 collective and mutual funds are based on the net asset value of shares held at year end, based on either published market quotations on active markets or other known sources including pricing from outside sources.

The estimated fair value of the pension plans' Level 2 corporate and municipal bonds is determined using other observable inputs, including benchmark yields, reported trades, broker/dealer quotes, bids, offers, future cash flows and other reference data.

The estimated fair value of the pension plans' Level 1 U.S. Treasury securities are valued based on quoted prices on an active market.

The estimated fair value of the pension plans' Level 2 U.S. Treasury and mortgage-backed securities are valued mainly using other observable inputs, including benchmark yields, reported trades, broker/dealer quotes, bids, offers, to be announced prices, future cash flows and other reference data. Some of these securities are valued using pricing from outside sources.

Though the Company believes the methods used to estimate fair value are consistent with those used by other market participants, the use of other methods or assumptions could result in a different estimate of fair value. For the years ended December 31, 2012 and 2011, there were no transfers between Levels 1 and 2.

The fair value of the Company's pension net plan assets by class is as follows:



	Fair Value Measurements at December 31, 2012, Using
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance at December 31, 2012
	(In thousands)
Assets:
Cash equivalents	$	2,145	$	10,460	$	—	$	12,605
Equity securities:
U.S. companies	86,981		—		—		86,981
International companies	39,818		—		—		39,818
Collective and mutual funds*	82,787		20,065		—		102,852
Corporate bonds	—		45,112		—		45,112
Municipal bonds	—		9,302		—		9,302
U.S. Treasury securities	7,980		4,534		—		12,514
Total assets measured at fair value	$	219,711	$	89,473	$	—	$	309,184

* Collective and mutual funds invest approximately 12 percent in common stock of mid-cap U.S. companies, 26 percent in common stock of large-cap U.S. companies, 13 percent in U.S. Treasuries, 41 percent in corporate bonds and 8 percent in other investments.



	Fair Value Measurements at December 31, 2011, Using
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance at December 31, 2011
	(In thousands)
Assets:
Cash equivalents	$	2,256	$	17,534	$	—	$	19,790
Equity securities:
U.S. companies	99,315		—		—		99,315
International companies	35,353		—		—		35,353
Collective and mutual funds*	43,214		15,541		—		58,755
Corporate bonds	—		23,579		289		23,868
Mortgage-backed securities	—		22,987		—		22,987
Municipal bonds	—		9,290		—		9,290
U.S. Treasury securities	—		8,642		—		8,642
Total assets measured at fair value	$	180,138	$	97,573	$	289	$	278,000

* Collective and mutual funds invest approximately 26 percent in common stock of mid-cap U.S. companies, 26 percent in common stock of large-cap U.S. companies, 13 percent in U.S. Treasuries, 6 percent in corporate bonds and 29 percent in other investments.

The following table sets forth a summary of changes in the fair value of the pension plans' Level 3 assets for the year ended December 31, 2012:



	Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
	Corporate Bonds
	(In thousands)
Balance at beginning of year	$	289
Total realized/unrealized losses	(47		)
Purchases, issuances and settlements (net)	(242		)
Balance at end of year	$	—

The following table sets forth a summary of changes in the fair value of the pension plans' Level 3 assets for the year ended December 31, 2011:



	Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
	Corporate Bonds			Collateral Held on Loaned Securities			Total
	(In thousands)
Balance at beginning of year	$	—		$	694		$	694
Total realized/unrealized losses	(2		)	(259		)	(261		)
Purchases, issuances and settlements (net)	291			(435		)	(144		)
Balance at end of year	$	289		$	—		$	289

The estimated fair values of the Company's other postretirement benefit plan assets are determined using the market approach.

The estimated fair value of the other postretirement benefit plan's Level 1 and Level 2 cash equivalents is valued at the net asset value of shares held at year end, based on published market quotations on active markets, or using other known sources including pricing from outside sources. Units of this fund can be redeemed on a daily basis at their net asset value and have no redemption restrictions. The assets are invested in high-quality, short-term money market instruments that consist of municipal obligations.

The estimated fair value of the other postretirement benefit plan's Level 1 equity securities is based on the closing price reported on the active market on which the individual securities are traded.

The estimated fair value of the other postretirement benefit plan's Level 2 insurance investment contract is based on contractual cash surrender values that are determined primarily by investments in managed separate accounts of the insurer. These amounts approximate fair value. The managed separate accounts are valued based on other observable inputs or corroborated market data.

The fair value of the Company's other postretirement benefit plan assets by asset class is as follows:



	Fair Value Measurements at December 31, 2012, Using
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance at December 31, 2012
	(In thousands)
Assets:
Cash equivalents	$	1,053	$	1,991	$	—	$	3,044
Equity securities:
U.S. companies	2,207		—		—		2,207
International companies	260		—		—		260
Insurance investment contract*	—		68,850		—		68,850
Total assets measured at fair value	$	3,520	$	70,841	$	—	$	74,361

* The insurance investment contract invests approximately 51 percent in common stock of large-cap U.S. companies, 15 percent in U.S. Treasuries, 10 percent in mortgage-backed securities, 11 percent in corporate bonds and 13 percent in other investments.



	Fair Value Measurements at December 31, 2011, Using
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance at December 31, 2011
	(In thousands)
Assets:
Cash equivalents	$	59	$	1,836	$	—	$	1,895
Equity securities:
U.S. companies	2,098		—		—		2,098
International companies	262		—		—		262
Insurance investment contract*	—		63,830		—		63,830
Total assets measured at fair value	$	2,419	$	65,666	$	—	$	68,085

* The insurance investment contract invests approximately 49 percent in common stock of large-cap U.S. companies, 15 percent in U.S. Treasuries, 12 percent in mortgage-backed securities, 11 percent in corporate bonds and 13 percent in other investments.

The Company expects to contribute approximately $18.1 million to its defined benefit pension plans and approximately $2.3 million to its postretirement benefit plans in 2013.

The following benefit payments, which reflect future service, as appropriate, and expected Medicare Part D subsidies are as follows:



Years	Pension Benefits		Other Postretirement Benefits		Expected Medicare Part D Subsidy
	(In thousands)
2013	$	23,193	$	6,099	$	256
2014	23,386		6,134		248
2015	23,646		6,127		239
2016	23,954		6,082		228
2017	24,531		6,083		217
2018 - 2022	128,971		29,051		896

Nonqualified benefit plans

In addition to the qualified plan defined pension benefits reflected in the table at the beginning of this note, the Company also has unfunded, nonqualified benefit plans for executive officers and certain key management employees that generally provide for defined benefit payments at age 65 following the employee's retirement or to their beneficiaries upon death for a 15-year period. The Company had investments of $84.4 million and $76.9 million at December 31, 2012 and 2011, respectively, consisting of equity securities of $41.9 million and $38.4 million, respectively, life insurance carried on plan participants (payable upon the employee's death) of $32.7 million and $31.8 million, respectively, and other investments of $9.8 million and $6.7 million, respectively. The Company anticipates using these investments to satisfy obligations under these plans. The Company's net periodic benefit cost for these plans was $8.1 million, $8.1 million and $7.8 million in 2012, 2011 and 2010, respectively. The total projected benefit obligation for these plans was $113.0 million and $113.8 million at December 31, 2012 and 2011, respectively. The accumulated benefit obligation for these plans was $107.5 million and $105.7 million at December 31, 2012 and 2011, respectively. A weighted average discount rate of 3.44 percent and 4.00 percent at December 31, 2012 and 2011, respectively, and a rate of compensation increase of 3.00 percent and 4.00 percent at December 31, 2012 and 2011, were used to determine benefit obligations. A discount rate of 4.00 percent and 5.11 percent at December 31, 2012 and 2011, respectively, and a rate of compensation increase of 4.00 percent and 4.00 percent at December 31, 2012 and 2011, were used to determine net periodic benefit cost.

The amount of benefit payments for the unfunded, nonqualified benefit plans are expected to aggregate $5.7 million in 2013; $5.6 million in 2014; $6.7 million in 2015; $6.5 million in 2016; $6.7 million in 2017 and $37.3 million for the years 2018 through 2022.

In 2012, the Company established a nonqualified defined contribution plan for certain key management employees. Costs incurred under this plan for 2012 were $84,000.

Defined contribution plans

The Company sponsors various defined contribution plans for eligible employees and the costs incurred under these plans were $29.3 million in 2012, $27.1 million in 2011 and $24.4 million in 2010.

Multiemployer plans

The Company contributes to a number of multiemployer defined benefit pension plans under the terms of collective-bargaining agreements that cover its union-represented employees. The risks of participating in these multiemployer plans are different from single-employer plans in the following aspects:


•	Assets contributed to the multiemployer plan by one employer may be used to provide benefits to employees of other participating employers


•	If a participating employer stops contributing to the plan, the unfunded obligations of the plan may be borne by the remaining participating employers


•	If the Company chooses to stop participating in some of its multiemployer plans, the Company may be required to pay those plans an amount based on the underfunded status of the plan, referred to as a withdrawal liability

The Company's participation in these plans is outlined in the following table. Unless otherwise noted, the most recent Pension Protection Act zone status available in 2012 and 2011 is for the plan's year-end at December 31, 2011, and December 31, 2010, respectively. The zone status is based on information that the Company received from the plan and is certified by the plan's actuary. Among other factors, plans in the red zone are generally less than 65 percent funded, plans in the yellow zone are between 65 percent and 80 percent funded, and plans in the green zone are at least 80 percent funded.



	EIN/Pension Plan Number	Pension Protection Act Zone Status		FIP/RP Status Pending/Implemented	Contributions						Surcharge Imposed	Expiration Date of Collective Bargaining Agreement
Pension Fund	EIN/Pension Plan Number	2012	2011	FIP/RP Status Pending/Implemented	2012		2011		2010		Surcharge Imposed	Expiration Date of Collective Bargaining Agreement
					(In thousands)
Edison Pension Plan	93-6061681-001	Green as of 12/31/2012	Green as of 12/31/2011	No	$	5,171	$	2,700	$	1,933	No	12/31/2014
IBEW Local 38 Pension Plan	34-6574238-001	Yellow as of 4/30/2012	Yellow as of 4/30/2011	Implemented	2,771		1,469		1,277		No	4/27/2014
IBEW Local No. 82 Pension Plan	31-6127268-001	Red as of 6/30/2012	Red as of 6/30/2011	Implemented	1,093		1,331		1,569		No	12/1/2013
IBEW Local 648 Pension Plan	31-6134845-001	Red as of 2/29/2012	Red as of 2/28/2011	Implemented	564		722		781		No	8/31/2015
Laborers Pension Trust Fund for Northern California	94-6277608-001	Yellow as of 5/31/2012	Yellow as of 5/31/2011	Implemented	567		628		413		No	6/30/2011– 6/30/2012
Local Union 212 IBEW Pension Trust Fund	31-6127280-001	Yellow as of 4/30/2012	Yellow as of 4/30/2011	Implemented	664		776		679		No	6/2/2013
National Electrical Benefit Fund	53-0181657-001	Green	Green	No	5,603		4,841		4,826		No	8/31/2011*– 12/31/2016
OE Pension Trust Fund	94-6090764-001	Yellow as of 12/31/2012	Yellow as of 12/31/2011	Implemented	1,156		1,367		1,035		No	6/30/2010*–3/31/2016
Operating Engineers Local 800 & WY Contractors Association, Inc. Pension Plan for Wyoming	83-6011320-001	Red as of 12/31/2012	Red as of 12/31/2011	Implemented	91		96		106		No	10/31/2005*
Operating Engineers Pension Trust	95-6032478-001	Red as of 6/30/2012	Red as of 6/30/2011	Implemented	761		458		343		No	6/30/2013– 12/31/2016
Other funds					16,338		14,770		17,314
Total contributions					$	34,779	$	29,158	$	30,276

* Plan includes collective bargaining agreements which have expired. The agreements contain provisions that automatically renew the existing contracts in lieu of a new negotiated collective bargaining agreement.

The Company was listed in the plans' Forms 5500 as providing more than 5 percent of the total contributions for the following plans and plan years:



Pension Fund	Year Contributions to Plan Exceeded More Than 5 Percent of Total Contributions (as of December 31 of the Plan's Year-End)
Defined Benefit Pension Plan of AGC-IUOE Local 701 Pension Trust Fund	2010
Edison Pension Plan	2011 and 2010
Eighth District Electrical Pension Fund	2010
IBEW Local 38 Pension Plan	2011 and 2010
IBEW Local No. 82 Pension Plan	2011 and 2010
Local Union No. 124 IBEW Pension Trust Fund	2011 and 2010
Local Union 212 IBEW Pension Trust Fund	2011 and 2010
IBEW Local Union No. 357 Pension Plan A	2011 and 2010
IBEW Local 648 Pension Plan	2011 and 2010
Idaho Plumbers and Pipefitters Pension Plan	2011 and 2010
Minnesota Teamsters Construction Division Pension Fund	2011 and 2010
Operating Engineers Local 800 & WY Contractors Association, Inc. Pension Plan for Wyoming	2011 and 2010
Plumbers and Pipefitters Local 162 Pension Fund	2010
Pension and Retirement Plan of Plumbers and Pipefitters Union Local No. 525	2011

The Company also contributes to a number of multiemployer other postretirement plans under the terms of collective-bargaining agreements that cover its union-represented employees. These plans provide benefits such as health insurance, disability insurance and life insurance to retired union employees. Many of the multiemployer other postretirement plans are combined with active multiemployer health and welfare plans. The Company's total contributions to its multiemployer other postretirement plans, which also includes contributions to active multiemployer health and welfare plans, were $31.4 million, $24.0 million and $24.7 million for the years ended December 31, 2012, 2011 and 2010, respectively.

Amounts contributed in 2012, 2011 and 2010 to defined contribution multiemployer plans were $18.7 million, $15.3 million and $15.4 million, respectively.