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CONTINGENT LIABILITIES AND OTHER MATTERS (Details 3) (Consortium arrangements, Thermal Equipment and Services reportable segment, USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 29, 2014	Dec. 31, 2013
Consortium arrangements | Thermal Equipment and Services reportable segment
Collaborative Arrangements
Entity's share of the aggregate contract value on open consortium arrangements	$ 142.3	$ 139.3
Percentage of entity's share of the aggregate contract value, recognized as revenue	88.00%	87.00%
Aggregate contract value on open consortium arrangements	447.9	433.8
Estimated fair value of potential obligation recorded as a liabilities	$ 0.7	$ 1.7

X

- Definition

Represents the aggregate contract value on open consortium arrangements.

+ References

No definition available.

+ Details

Name:	spw_CollaborativeArrangementsAggregateContractValue
Namespace Prefix:	spw_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Represents the entity's share of aggregate contract value on open consortium arrangements.

+ References

No definition available.

+ Details

Name:	spw_CollaborativeArrangementsContractValue
Namespace Prefix:	spw_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Represents the estimated fair value of potential obligation under the joint and several liability provisions associated with consortium arrangements, recorded as a liability.

+ References

No definition available.

+ Details

Name:	spw_CollaborativeArrangementsEstimatedFairValueOfPotentialObligation
Namespace Prefix:	spw_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Represents the percentage of entity's share of aggregate contract value which had been recognized as revenue.

+ References

No definition available.

+ Details

Name:	spw_CollaborativeArrangementsPercentageOfRevenueRecognized
Namespace Prefix:	spw_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration