Severe Weather Event (Textuals) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
Mar. 28, 2013	Dec. 31, 2012
Impact From Severe Weather Event [Line Items]
Impact from severe weather event	$ 8.8
Insurance Settlement		$ 234.9

The charge taken on the income statement included in operating income for peoperty damage, clean up and recovery costs related to a tornado. Also includes expenses incurred to make up for production interruption and reduce further disruption.

No definition available.

Name:	spr_SevereWeatherEventCharge
Namespace Prefix:	spr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration