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EMPLOYEE BENEFIT PLANS (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			9 Months Ended			3 Months Ended			9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended
	Sep. 27, 2014	Mar. 29, 2014 item	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014 Discontinued operations	Sep. 27, 2014 Domestic Pension Plans	Dec. 31, 2013 Domestic Pension Plans	Sep. 28, 2013 Domestic Pension Plans	Sep. 27, 2014 Domestic Pension Plans	Sep. 28, 2013 Domestic Pension Plans	Sep. 27, 2014 Foreign Pension Plans	Sep. 28, 2013 Foreign Pension Plans	Sep. 27, 2014 Foreign Pension Plans	Sep. 28, 2013 Foreign Pension Plans	Sep. 27, 2014 Postretirement Plans	Sep. 28, 2013 Postretirement Plans	Sep. 27, 2014 Postretirement Plans	Sep. 28, 2013 Postretirement Plans
EMPLOYEE BENEFIT PLANS
Number of eligible former employees offered with voluntary single lump-sum payment option in lieu of a future pension benefit		7,100
Percentage of projected benefit obligation of the Plan settled as a result of lump-sum payments		38.00%
Projected benefit obligation of the Plan settled as a result of lump-sum payments		$ 165.2
Employee benefit plans
Charge reflected in net periodic pension benefit expense		4.6								4.6
Net periodic pension/postretirement benefit expense (income)
Service cost							1.8		1.9	5.4	5.6	0.7	0.6	2.1	2.0	0.1	0.1	0.4	0.3
Interest cost							4.5		12.0	15.7	36.0	3.5	3.4	10.5	10.0	1.3	1.2	3.9	3.6
Expected return on plan assets							(4.7)		(18.8)	(14.9)	(56.3)	(4.3)	(4.4)	(12.8)	(13.1)
Settlement charges (credits), net							(0.1)			0.4
Amortization of unrecognized prior service credits																(0.1)	(0.4)	(0.2)	(1.0)
Recognized net actuarial loss										14.8
Net periodic pension and postretirement benefit expense (income)	2.8		(4.2)	25.6	(12.7)		1.5		(4.9)	21.4	(14.7)	(0.1)	(0.4)	(0.2)	(1.1)	1.3	0.9	4.1	2.9
Less: Net periodic pension benefit income of discontinued operations												(0.1)	(0.2)	(0.3)	(0.2)
Net periodic pension benefit expense (income) of continuing operations													(0.2)	0.1	(0.9)
Reduction to estimated settlement charge								4.2
Employer contribution to pension plan				$ 9.7		$ 2.0

X

- Definition

Represents the amount of charge reflected in net periodic benefit expense related to the partial settlement of the SPX U.S. Pension Plan.

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Represents the total amount of net periodic benefit (cost) for defined benefit plans for the period related to discontinued operations.

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Represents the amount of reduction to the estimated settlement charge reflected in net periodic benefit expense related to the partial settlement of the SPX U.S. Pension Plan.

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Represents the number of eligible former employees offered with voluntary single lump-sum payment option in lieu of a future pension benefit under the Plan during a designated election period.

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For continuing operations, the amount of pension and other (such as medical, dental and life insurance) postretirement benefit costs recognized during the period for defined benefit plans (periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss) on assets, prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments).

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Represents the percentage of projected benefit obligation settled as a result of lump-sum payments during the period.

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Represents the amount of projected benefit obligation settled as a result of lump-sum payments during the period.

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The amount of the prior service cost or credit recognized in net periodic benefit cost relating to benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation.

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Amount before tax, after reclassification adjustments, of actuarial gain (loss) that has not been recognized in the income statement.

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An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets.

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The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time.

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The total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments.

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Amount of net gain (loss) recognized in net periodic benefit cost as a result of an irrevocable action that relieves the employer (or the plan) of primary responsibility for a benefit obligation and eliminates significant risks related to the obligation and the assets used to effect the settlement. Examples of transactions that constitute a settlement include, but are not limited to, lump-sum cash payments to plan participants in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contracts to cover vested benefits.

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The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan.

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The amount of cash or cash equivalents contributed by the entity to fund its pension plans.

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