(10) Employee Benefit Plans

Overview — Defined benefit pension plans cover a portion of our salaried and hourly paid employees, including certain employees in foreign countries. Beginning in 2001, we discontinued providing these pension benefits generally to newly hired employees. In addition, we no longer provide service credits to certain active participants. Of the U.S. employees covered by a defined benefit pension plan and actively accruing a benefit, most are covered by an account balance plan or are part of a collectively bargained plan.

We have domestic postretirement plans that provide health and life insurance benefits to certain retirees and their dependents. Beginning in 2003, we discontinued providing these postretirement benefits generally to newly hired employees. Some of these plans require retiree contributions at varying rates. Not all retirees are eligible to receive these benefits, with eligibility governed by the plan(s) in effect at a particular location.

The plan year-end date for all our plans is December 31.

Transfer of Retiree Pension Obligations and Lump-Sum Offer — On November 12, 2013, we executed an agreement to transfer obligations for monthly pension payments to retirees under the SPX U.S. Pension Plan (the "Plan") to Massachusetts Mutual Life Insurance Company ("Mass Mutual"). Under the agreement, Mass Mutual has irrevocably assumed the obligation to make future pension payments to the approximate 16,000 retirees of the Plan beginning in April 2014. The Plan paid Mass Mutual $663.7 to assume obligations totaling approximately $609.0. Additionally, during a designated election period in the first quarter of 2014, we are offering approximately 7,500 eligible former employees under the Plan a voluntary single lump-sum payment option in lieu of a future pension benefit under the Plan.

Change in Accounting Methods — As further described in Note 1, we elected to change our accounting methods for recognizing changes in the fair value of plan assets and actuarial gains and losses associated with our pension and postretirement benefit plans. Accordingly, we have made revisions to previously reported amounts, including net periodic benefit cost, AOCI, and retained earnings. See Note 19 for the impact of the change in accounting methods on our consolidated financial statements for the years ended December 31, 2013, 2012 and 2011.

Defined Benefit Pension Plans

Plan assets — Our investment strategy is based on the long-term growth of principal while mitigating overall risk to ensure that funds are available to pay benefit obligations. The domestic plan assets are invested in a broad range of investment classes, including domestic and international equities, fixed income securities and other investments. We engage various investment managers who are regularly evaluated on long-term performance, adherence to investment guidelines and the ability to manage risk commensurate with the investment style and objective for which they were hired. We continuously monitor the value of assets by class and routinely rebalance our portfolio with the goal of meeting our target allocations. The strategy for equity assets is to minimize concentrations of risk by investing primarily in companies in a diversified mix of industries worldwide, while targeting neutrality in exposure to global versus regional markets, fund types and fund managers.

The strategy for bonds emphasizes investment-grade corporate and government debt with maturities matching a portion of the longer duration pension liabilities. The bonds strategy also includes a high yield element, which is generally shorter in duration. A small portion of U.S. plan assets is allocated to private equity partnerships and real estate asset fund investments for diversification, providing opportunities for above market returns. Allowable investments under the plan agreements include equity securities, fixed income securities, mutual funds, venture capital funds, real estate and cash and equivalents. In addition, investments in futures and option contracts, commodities and other derivatives are allowed in commingled fund allocations managed by professional investment managers. Investments prohibited under the plan agreements include private placements and short selling of stock. No shares of our common stock were held by our defined benefit pension plans as of December 31, 2013 and 2012.

Actual asset allocation percentages of each class of our domestic and foreign pension plan assets as of December 31, 2013 and 2012, along with the targeted asset investment allocation percentages, each of which is based on the midpoint of an allocation range, were as follows:

Domestic Pension Plans

	Actual Allocations						Mid-point of Target Allocation Range

	2013			2012			2013
Global equities		6	%		12	%		5	%
Global equity common trust funds		25	%		28	%		10	%
Fixed income common trust funds		20	%		29	%		65	%
Commingled global fund allocations		15	%		26	%		18	%
Short-term investments⁽¹⁾		33	%		4	%		0	%
Other⁽²⁾		1	%		1	%		2	%


Total		100	%		100	%		100	%

⁽¹⁾: Short-term investments are generally invested in actively managed common trust funds or interest-bearing accounts.
⁽²⁾: Assets included in this class at December 31, 2013 and 2012 are comprised primarily of insurance contracts, private equity and publicly traded real estate trusts.

Foreign Pension Plans

	Actual Allocations						Mid-point of Target Allocation Range

	2013			2012			2013
Global equity common trust funds		43	%		38	%		43	%
Fixed income common trust funds		40	%		40	%		30	%
Non-U.S. Government securities		14	%		13	%		25	%
Short-term investments⁽¹⁾		2	%		8	%		1	%
Other⁽²⁾		1	%		1	%		1	%


Total		100	%		100	%		100	%

⁽¹⁾: Short-term investments are generally invested in actively managed common trust funds or interest-bearing accounts.
⁽²⁾: Assets included in this class comprised primarily insurance contracts.

The fair value of pension plan assets at December 31, 2013, by asset class, were as follows:

	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)

Asset class:
Equity securities:
Global equities:
Capital equipment	$	4.8	$	4.8	$	—	$	—
Consumer goods		3.2		3.2		—		—
Energy		1.9		1.9		—		—
Finance		3.4		3.4		—		—
Materials		2.9		2.9		—		—
Services		1.4		1.4		—		—
Miscellaneous		8.9		8.9		—		—
Global equity common trust funds⁽¹⁾		247.2		37.9		202.5		6.8
Debt securities:
Fixed income common trust funds⁽²⁾		212.2		27.8		184.4		—
Non-U.S. Government securities		42.4		—		42.4		—
Alternative investments:
Commingled global fund allocations⁽³⁾		71.5		20.0		51.5		—
Other:
Short-term investments⁽⁴⁾		163.7		163.7		—		—
Other⁽⁵⁾		6.9		0.5		—		6.4


Total	$	770.4	$	276.4	$	480.8	$	13.2

The fair value of pension plan assets at December 31, 2012, by asset class, were as follows:

	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)

Asset class:
Equity securities:
Global equities:
Capital equipment	$	20.2	$	20.2	$	—	$	—
Consumer goods		17.7		17.7		—		—
Energy		8.8		8.8		—		—
Finance		8.2		8.2		—		—
Materials		9.4		9.4		—		—
Services		10.6		10.6		—		—
Miscellaneous		37.3		37.3		—		—
Global equity common trust funds⁽¹⁾		366.1		103.6		233.5		29.0
Debt securities:
Fixed income common trust funds⁽²⁾		380.5		69.4		309.7		1.4
Non-U.S. Government securities		36.3		—		36.3		—
Alternative investments:
Commingled global fund allocations⁽³⁾		247.1		91.2		0.3		155.6
Other:
Short-term investments⁽⁴⁾		61.5		61.5		—		—
Other⁽⁵⁾		10.1		2.4		0.3		7.4


Total	$	1,213.8	$	440.3	$	580.1	$	193.4

⁽¹⁾: This class represents investments in actively managed common trust funds that invest primarily in equity securities, which may include common stocks, options and futures. The funds are valued at the net asset value per share multiplied by the number of shares held as of the measurement date. The investments are valued based on market values and yields currently available for comparable securities of issuers with similar credit ratings. The Level of the fund(s) (Level 1, 2 or 3) is determined based on the classification of the significant holdings within the fund.
⁽²⁾: This class represents investments in actively managed common trust funds that invest in a variety of fixed income investments, which may include corporate bonds, both U.S. and non-U.S. municipal securities, interest rate swaps, options and futures. The funds are valued at the net asset value per share multiplied by the number of shares held as of the measurement date. The investments are valued based on yields currently available for comparable securities of issuers with similar credit ratings. The Level of the fund(s) (Level 1, 2 or 3) is determined based on the classification of the significant holdings within the fund.
⁽³⁾: This class represents investments in actively managed common trust funds with investments in both equity and debt securities. The investments may include common stock, corporate bonds, U.S. and non-U.S. municipal securities, interest rate swaps, options and futures. The funds are valued at the net asset value per share multiplied by the number of shares held as of the measurement date. The investments are valued based on market values and yields currently available for comparable securities of issuers with similar credit ratings. The Level of the fund(s) (Level 1, 2 or 3) is determined based on the classification of the significant holdings within the fund.
⁽⁴⁾: Short-term investments are valued at $1.00/unit, which approximates fair value. Amounts are generally invested in actively managed common trust funds or interest-bearing accounts.
⁽⁵⁾: This category represents investments in insurance contracts, private equity and publicly traded real estate investment trusts. The insurance contracts and private equity investments are valued using unobservable inputs from the fund manager, primarily based on discounted cash flows models.

Our domestic pension plans participate in a securities lending program through J.P. Morgan Chase Bank, National Association. Securities loaned are required to be fully collateralized by cash or other securities. The gross collateral and the related liability to return collateral amounted to $13.7 and $31.4 at December 31, 2013 and 2012, respectively, and have been included within "Level 2" of the fair value hierarchy in the tables above.

During 2013, in connection with our periodic review of the classification of assets within the fair value hierarchy, the balance of one fixed income common trust fund was transferred from Level 1 to Level 2 of the fair value hierarchy (the fair value of this fund was $16.6 and $69.2 at December 31, 2013 and 2012, respectively), and two fixed income common trust funds were transferred from Level 2 to Level 1 of the fair value hierarchy (the fair values of these funds were $27.6 and $46.3 at December 31, 2013 and 2012, respectively). There were no significant transfers between Level 1 and Level 2 of the fair value hierarchy during 2012. It is our policy to recognize transfers between Levels at the beginning of the fiscal year.

The following table summarizes changes in the fair value of Level 3 assets for the years ended December 31, 2013 and 2012:

	Global Equity Common Trust Funds			Commingled Global Fund Allocations			Fixed Income Common Trust Funds			Other			Total

Balance at December 31, 2011	$	24.4		$	129.9		$	1.4		$	6.0		$	161.7
Realized gains		—			—			—			0.1			0.1
Unrealized gains relating to instruments still held at period end		1.8			12.7			—			2.0			16.5
Purchases		2.8			13.0			—			—			15.8
Sales		—			—			—			(0.7	)		(0.7	)


Balance at December 31, 2012		29.0			155.6			1.4			7.4			193.4
Transfers from Level 3 to Level 2 assets		—			(105.6	)		—			—			(105.6	)
Realized gains		—			0.9			—			—			0.9
Unrealized gains (losses) relating to instruments still held at period end		0.4			—			—			(0.1	)		0.3
Purchases		3.1			—			—			—			3.1
Sales		(25.7	)		(50.9	)		(1.4	)		(0.9	)		(78.9	)


Balance at December 31, 2013	$	6.8		$	—		$	—		$	6.4		$	13.2

During 2013, in connection with our periodic review of the classification of assets within the fair value hierarchy, the balance of one commingled global fund was transferred from Level 3 assets to Level 2 assets. There were no transfers in or out of Level 3 assets in 2012.

Employer Contributions — We currently fund U.S. pension plans in amounts equal to the minimum funding requirements of the Employee Retirement Income Security Act of 1974, plus additional amounts that may be approved from time to time. During 2013, we made contributions of $277.9 to our qualified domestic pension plans, including a $250.0 discretionary contribution, and direct benefit payments of $6.3 to our non-qualified domestic pension plans. In 2014, we expect to make minimum required funding contributions of $0.1 to our qualified domestic pension plans and direct benefit payments of $9.1 to our non-qualified domestic pension plans.

Many of our foreign plan obligations are unfunded in accordance with local laws. These plans have no assets and instead are funded by us on a pay as you go basis in the form of direct benefit payments. To our foreign plans that are funded, we made contributions of $16.6 in 2013, which included $2.3 of contributions that relate to businesses that have been classified as discontinued operations. In addition, to our foreign plans that are unfunded, we made direct benefit payments of $3.7 in 2013. In 2014, we expect to make minimum required funding contributions of $11.2, which will include $3.0 of contributions that relate to businesses that have been classified as discontinued operations, and $2.8 of direct benefit payments to our foreign pension plans.

Estimated Future Benefit Payments — Following is a summary, as of December 31, 2013, of the estimated future benefit payments for our pension plans in each of the next five fiscal years and in the aggregate for five fiscal years thereafter. Benefit payments are paid from plan assets or directly by us for our non-funded plans. The expected benefit payments are estimated based on the same assumptions used at December 31, 2013 to measure our obligations and include benefits attributable to estimated future employee service.

Estimated minimum benefit payments:
(Domestic and foreign pension plans)

	Domestic Pension Benefits		Foreign Pension Benefits

2014	$	35.9	$	14.2
2015		81.4		15.3
2016		21.0		16.2
2017		23.4		17.1
2018		25.1		17.3
Subsequent five years		170.7		92.9

Obligations and Funded Status — The funded status of our pension plans is dependent upon many factors, including returns on invested assets and the level of market interest rates. The combined unfunded status of our pension plans as of December 31, 2013 has decreased since December 31, 2012, primarily as a result of a $250.0 discretionary contribution to our qualified domestic pension plan and, to a lesser extent, higher discount rates being used to value the domestic plans in 2013 compared to 2012. Our non-funded pension plans account for $198.6 of the current underfunded status, as these plans are not required to be funded. The following tables show the domestic and foreign pension plans' funded status and amounts recognized in our consolidated balance sheets:

	Domestic Pension Plans						Foreign Pension Plans

	2013			2012			2013			2012
Change in projected benefit obligation:
Projected benefit obligation — beginning of year	$	1,345.8		$	1,193.5		$	323.0		$	280.4
Service cost		7.6			9.8			2.7			2.5
Interest cost		45.6			54.4			13.4			14.3
Employee contributions		—			—			0.2			0.2
Actuarial (gains) losses		(49.8	)		170.6			9.6			26.3
Settlements⁽¹⁾		(708.8	)		—			—			—
Curtailment gain		—			(4.0	)		—			—
Benefits paid		(71.6	)		(78.5	)		(14.8	)		(11.6	)
Foreign exchange and other		—			—			1.5			10.9


Projected benefit obligation — end of year	$	568.8		$	1,345.8		$	335.6		$	323.0

⁽¹⁾: Settlements include $663.7 that the Plan paid Mass Mutual to irrevocably assume the obligation to make future pension payments to approximately 16,000 retirees of the Plan beginning in April 2014 and other lump sum settlements of $45.1 paid to Plan participants during 2013.

	Domestic Pension Plans						Foreign Pension Plans

	2013			2012			2013			2012
Change in plan assets:
Fair value of plan assets — beginning of year	$	936.8		$	868.2		$	277.0		$	247.0
Actual return on plan assets		26.7			107.1			19.1			19.2
Contributions (employer and employee)		284.2			40.0			16.8			10.6
Settlements		(708.8	)		—			—			—
Benefits paid		(71.6	)		(78.5	)		(11.1	)		(9.3	)
Foreign exchange and other		—			—			1.3			9.5


Fair value of plan assets — end of year	$	467.3		$	936.8		$	303.1		$	277.0




Funded status at year-end		(101.5	)		(409.0	)		(32.5	)		(46.0	)
Amounts recognized in the consolidated balance sheets consist of:
Other assets	$	38.2		$	—		$	36.2		$	24.9
Accrued expenses		(8.9	)		(5.9	)		(2.7	)		(2.6	)
Other long-term liabilities		(130.8	)		(403.1	)		(66.0	)		(68.3	)


Net amount recognized	$	(101.5	)	$	(409.0	)	$	(32.5	)	$	(46.0	)




Amount recognized in accumulated other comprehensive income (pre-tax) consists of — net prior service credits	$	(0.1	)	$	(0.1	)	$	(0.1	)	$	(0.1	)

The following is information about our pension plans that had accumulated benefit obligations in excess of the fair value of their plan assets at December 31, 2013 and 2012:

	Domestic Pension Plans				Foreign Pension Plans

	2013		2012		2013		2012
Projected benefit obligation	$	140.5	$	1,345.8	$	117.7	$	119.3
Accumulated benefit obligation		135.9		1,331.5		114.3		116.4
Fair value of plan assets		0.9		936.8		49.0		48.5

The accumulated benefit obligation for all domestic and foreign pension plans was $556.1 and $331.7, respectively, at December 31, 2013 and $1,331.5 and $314.8, respectively, at December 31, 2012.

Components of Net Periodic Pension Benefit (Income) Expense — Net periodic pension benefit (income) expense for our domestic and foreign pension plans included the following components:

Domestic Pension Plans

	Year ended December 31,

	2013			2012			2011
Service cost	$	7.6		$	9.8		$	9.9
Interest cost		45.6			54.4			57.4
Expected return on plan assets		(73.2	)		(61.8	)		(60.3	)
Amortization of unrecognized prior service credits		—			(0.6	)		(0.9	)
Recognized net actuarial (gains) losses⁽¹⁾		(3.3	)		121.4			40.7


Total net periodic pension benefit (income) expense	$	(23.3	)	$	123.2		$	46.8

⁽¹⁾: Consists primarily of our reported actuarial (gains) losses, the difference between actual and expected returns on plan assets, and curtailments.

Foreign Pension Plans

	Year ended December 31,

	2013			2012			2011
Service cost	$	2.7		$	2.8		$	2.8
Interest cost		13.4			14.6			14.2
Expected return on plan assets		(17.6	)		(16.6	)		(16.2	)
Recognized net actuarial losses⁽¹⁾		8.2			23.6			13.3


Total net periodic pension benefit expense		6.7			24.4			14.1
Less: Net periodic pension income (expense) of discontinued operations		2.8			(2.1	)		(11.5	)


Net periodic pension benefit expense of continuing operations	$	9.5		$	22.3		$	2.6

⁽¹⁾: Consists primarily of our reported actuarial losses and the difference between actual and expected returns on plan assets.

Assumptions — Actuarial assumptions used in accounting for our domestic and foreign pension plans were as follows:

	Year ended December 31,

	2013			2012			2011
Domestic Pension Plans
Weighted-average actuarial assumptions used in determining net periodic pension expense:
Discount rate		3.85	%		4.69	%		5.22	%
Rate of increase in compensation levels		3.75	%		3.75	%		4.00	%
Expected long-term rate of return on assets		7.25	%		7.25	%		7.25	%
Weighted-average actuarial assumptions used in determining year-end benefit obligations:
Discount rate		4.77	%		3.74	%		4.69	%
Rate of increase in compensation levels		3.75	%		3.75	%		3.75	%
Foreign Pension Plans
Weighted-average actuarial assumptions used in determining net periodic pension expense:
Discount rate		4.35	%		5.10	%		5.42	%
Rate of increase in compensation levels		3.91	%		3.92	%		4.15	%
Expected long-term rate of return on assets		6.45	%		6.56	%		7.00	%
Weighted-average actuarial assumptions used in determining year-end benefit obligations:
Discount rate		4.23	%		4.35	%		5.10	%
Rate of increase in compensation levels		3.92	%		3.91	%		3.92	%

We review the pension assumptions annually. Pension income or expense for the year is determined using assumptions as of the beginning of the year (except for the effects of recognizing changes in the fair value of plan assets and actuarial gains and losses in the fourth quarter of each year), while the funded status is determined using assumptions as of the end of the year. We determined assumptions and established them at the respective balance sheet date using the following principles: (i) the expected long-term rate of return on plan assets is established based on forward looking long-term expectations of asset returns over the expected period to fund participant benefits based on the target investment mix of our plans; (ii) the discount rate is determined by matching the expected projected benefit obligation cash flows for each of the plans to a yield curve that is representative of long-term, high-quality (rated AA or higher) fixed income debt instruments as of the measurement date; and (iii) the rate of increase in compensation levels is established based on our expectations of current and foreseeable future increases in compensation. In addition, we consider advice from independent actuaries.

Multiemployer Benefit Plans

Upon acquisition of Clyde Union, we assumed participation in a multiemployer benefit plan under the terms of a collective-bargaining agreement that covers Clyde Union's domestic 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 us 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; and

•

If we choose to stop participating in the multiemployer plan, we may be required to pay an amount based on the underfunded status of the plan, referred to as a withdrawal liability.

We participate in the following multiemployer benefit plan:

Pension Fund		EIN Pension Plan Number			Pension Protection Act Zone Status — 2013		Financial Improvement Plan / Rehabilitation Plan Status Pending			2013 Contributions			2012 Contributions			Surcharge Imposed			Expiration Date of Collective Bargaining Agreement

IAM National Pension Fund, National Pension Plan			51-6031295-002		Green			No		$	0.4		$	0.3			No			August 12, 2014

The contributions made by Clyde Union during 2013 and 2012 were not more than 5% of the total contributions made to the IAM National Pension Fund, National Pension Plan ("IAM"). In 2011, the IAM began applying an election for funding relief which allows the IAM to amortize the investment losses incurred for the plan year ended December 31, 2008 over a period of up to 29 years (as opposed to 15 years that would otherwise have been required). Furthermore, in accordance with the election, the current asset valuation method has been updated to recognize the investment losses incurred during the 2008 plan year over a ten-year period as opposed to the previous period of five years.

Postretirement Benefit Plans

Employer Contributions and Future Benefit Payments — Our postretirement medical plans are unfunded and have no plan assets, but are instead funded by us on a pay as you go basis in the form of direct benefit payments or policy premium payments. In 2013, we made benefit payments of $14.7 (net of federal subsidies of $0.7) to our postretirement benefit plans. Following is a summary, as of December 31, 2013, of the estimated future benefit payments and expected federal subsidies for our postretirement plans in each of the next five fiscal years and in the aggregate for five fiscal years thereafter. The expected benefit payments and federal subsidies are estimated based on the same assumptions used at December 31, 2013 to measure our obligations and include benefits attributable to estimated future employee service.

	Postretirement Payments, net of Subsidies		Postretirement Subsidies

2014	$	14.0	$	1.4
2015		13.5		1.4
2016		12.9		1.3
2017		12.2		1.3
2018		11.6		1.3
Subsequent five years		48.4		5.4

Obligations and Funded Status — The following tables show the postretirement plans' funded status and amounts recognized in our consolidated balance sheets:

	Postretirement Benefits

	2013			2012
Change in accumulated postretirement benefit obligation:
Accumulated postretirement benefit obligation — beginning of year	$	148.7		$	148.7
Service cost		0.5			0.5
Interest cost		4.8			6.1
Actuarial (gains) losses		(7.8	)		7.2
Benefits paid		(14.7	)		(13.8	)


Accumulated postretirement benefit obligation — end of year	$	131.5		$	148.7




Funded status at year-end	$	(131.5	)	$	(148.7	)
Amounts recognized in the consolidated balance sheets consist of:
Accrued expenses	$	(13.7	)	$	(14.6	)
Other long-term liabilities		(117.8	)		(134.1	)


Net amount recognized	$	(131.5	)	$	(148.7	)




Amount recognized in accumulated other comprehensive income (pre-tax) consists of — net prior service credits	$	(0.3	)	$	(1.7	)

The net periodic postretirement benefit (income) expense included the following components:

	Year ended December 31,

	2013			2012			2011
Service cost	$	0.5		$	0.5		$	0.4
Interest cost		4.8			6.1			7.0
Amortization of unrecognized prior service credits		(1.4	)		(1.4	)		(1.4	)
Recognized net actuarial (gains) losses		(7.8	)		7.3			(3.9	)


Net periodic postretirement benefit (income) expense	$	(3.9	)	$	12.5		$	2.1

Actuarial assumptions used in accounting for our domestic postretirement plans were as follows:

	Year ended December 31,

	2013			2012			2011
Assumed health care cost trend rates:
Heath care cost trend rate for next year		6.98	%		7.13	%		7.52	%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)		5.00	%		5.00	%		5.00	%
Year that the rate reaches the ultimate trend rate		2024			2019			2019
Discount rate used in determining net periodic postretirement benefit expense		3.37	%		4.36	%		4.85	%
Discount rate used in determining net year-end postretirement benefit obligation		4.23	%		3.37	%		4.36	%

The accumulated postretirement benefit obligation was determined using the terms and conditions of our various plans, together with relevant actuarial assumptions and health care cost trend rates. It is our policy to review the postretirement assumptions annually. The assumptions are determined by us and are established based on our prior experience and our expectations that future rates will decline. In addition, we consider advice from independent actuaries.

Assumed health care cost trend rates can have a significant effect on the amounts reported for the postretirement benefit plans. Including the effects of recognizing actuarial gains and losses into earnings, a one percentage point increase in the assumed health care cost trend rate would have increased our estimated 2013 postretirement expense by $8.1, and a one percentage point decrease in the assumed health care cost trend rate would have decreased our estimated 2013 postretirement expense by $7.3.

Defined Contribution Retirement Plans

We maintain a defined contribution retirement plan (the "DC Plan") pursuant to Section 401(k) of the U.S. Internal Revenue Code. Under the DC Plan, eligible U.S. employees may voluntarily contribute up to 50% of their compensation into the DC Plan and we match a portion of participating employees' contributions. Our matching contributions are primarily made in newly issued shares of company common stock and are issued at the prevailing market price. The matching contributions vest with the employee immediately upon the date of the match and there are no restrictions on the resale of common stock held by employees.

Under the DC Plan, we contributed 0.206, 0.266 and 0.271 shares of our common stock to employee accounts in 2013, 2012 and 2011, respectively. Compensation expense is recorded based on the market value of shares as the shares are contributed to employee accounts. We recorded $15.1 in 2013, $15.3 in 2012 and $14.8 in 2011 as compensation expense related to the matching contribution.

Certain collectively-bargained employees participate in the DC Plan with company contributions not being made in company common stock, although company common stock is offered as an investment option under these plans.

We also maintain a Supplemental Retirement Savings Plan ("SRSP"), which permits certain members of our senior management and executive groups to defer eligible compensation in excess of the amounts allowed under the DC Plan. We match a portion of participating employees' deferrals to the extent allowable under the SRSP provisions. The matching contributions vest with the participant immediately. Our funding of the participants' deferrals and our matching contributions are held in certain mutual funds (as allowed under the SRSP), as directed by the participant. The fair values of these assets, which totaled $46.2 and $45.9 at December 31, 2013 and 2012, respectively, are based on quoted prices in active markets for identical assets (Level 1). In addition, the assets under the SRSP are available to the general creditors in the event of our bankruptcy and, thus, are maintained on our consolidated balance sheets within other non-current assets, with a corresponding amount in other long-term liabilities for our obligation to the participants. Lastly, these assets are accounted for as trading securities. During 2013, 2012 and 2011, we recorded additional compensation expense of $0.3, $0.3 and $0.4, respectively, relating to our matching contributions to the SRSP.