CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 28, 2015
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
Repurchase of senior notes, premiums paid	$ 30.6

Represents the amount of cash outflow for premiums paid on repurchase of senior notes during the period.

No definition available.

Name:	spw_PaymentsOfPremiumsOnRepurchaseOfSeniorNotes
Namespace Prefix:	spw_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration