Incremental Tender Amount

No definition available.

Name:	spr_IncrementalTenderAmount
Namespace Prefix:	spr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of capital lease obligation due within one year or the normal operating cycle, if longer.

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal, through the balance sheet date and due to be paid more than one year (or one operating cycle, if longer) after the balance sheet date.

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Name:	us-gaap_CapitalLeaseObligationsNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

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+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Definition

Amount of long-term debt and lease obligation, classified as noncurrent.

+ References

+ Details

Name:	us-gaap_LongTermDebtAndCapitalLeaseObligations
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of long-term debt and lease obligation, classified as current.

+ References

+ Details

Name:	us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of long-term debt classified as other, payable within one year or the operating cycle, if longer.

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+ Details

Name:	us-gaap_OtherLongTermDebtCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of long-term debt classified as other, payable after one year or the operating cycle, if longer.

+ References

+ Details

Name:	us-gaap_OtherLongTermDebtNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of the portion of long-term, collateralized debt obligations due within one year or the operating cycle, if longer. Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

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+ Details

Name:	us-gaap_SecuredDebtCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying amount of collateralized debt obligations with maturities initially due after one year or beyond the operating cycle, if longer, excluding the current portion. Obligations include, but not limited to, mortgage loans, chattel loans, and other borrowings secured by assets.

+ References

+ Details

Name:	us-gaap_SecuredLongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion. Senior note holders are paid off in full before any payments are made to junior note holders.

+ References

+ Details

Name:	us-gaap_SeniorLongTermNotes
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of the portion of long-term notes having the highest claim on the assets of the issuer in case of bankruptcy or liquidation, due within one year or the normal operating cycle, if longer. Senior note holders are paid off in full before any payments are made to debt holders having a lesser priority of repayment.

+ References

+ Details

Name:	us-gaap_SeniorNotesCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_LongtermDebtTypeAxis=spr_SeniorunsecuredtermloanAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=spr_A2018RevolverMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=spr_SeniorUnsecuredNotesDue2021MemberDomain
Namespace Prefix:
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Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=spr_SeniorUnsecuredNotesDue2022Member
Namespace Prefix:
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Balance Type:
Period Type:

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=spr_SeniorUnsecuredNotesDue2028Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=spr_SeniorUnsecuredNotesDue2026Member
Namespace Prefix:
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Balance Type:
Period Type:

- Details

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Debt (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018	Jun. 06, 2016
Debt Instrument [Line Items]
Capital Lease Obligations, Current	$ 25,800,000	$ 7,100,000
Capital Lease Obligations, Noncurrent	121,300,000	35,300,000
Other Long-term Debt, Current	1,600,000	1,600,000
Other Long-term Debt, Noncurrent	57,800,000	59,300,000
Long-term Debt and Lease Obligation, Current	50,200,000	31,400,000
Long-term Debt and Lease Obligation	2,984,100,000	1,864,000,000.0
Senior unsecured term loan A [Member]
Debt Instrument [Line Items]
Secured Debt, Current		22,700,000
Secured Long-term Debt, Noncurrent		182,000,000.0
Senior Notes, Current	22,800,000
Senior Notes, Noncurrent	415,700,000
2018 Revolver [Member]
Debt Instrument [Line Items]
Senior Notes, Current	0	0
Senior Notes, Noncurrent	800,000,000.0	0
Senior Unsecured Notes Due 2021 [Member] [Domain]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	300,000,000.0
Senior Notes, Current		0
Senior Notes, Noncurrent	299,100,000	298,500,000
Senior Unsecured Notes Due 2022 [Member]
Debt Instrument [Line Items]
Incremental Tender Amount	97,400,000
Senior Unsecured Notes Due 2023 [Member] [Domain]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	300,000,000.0
Senior Notes, Current		0
Senior Notes, Noncurrent	298,300,000	297,900,000
Debt Instrument, Interest Rate, Stated Percentage			3.95%
Senior Unsecured Notes Due 2028 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	700,000,000.0
Senior Notes, Current		0
Senior Notes, Noncurrent	$ 694,100,000	693,500,000
Debt Instrument, Interest Rate, Stated Percentage	4.60%
Senior Unsecured Notes Due 2026 [Member]
Debt Instrument [Line Items]
Secured Debt, Current		0
Debt Instrument, Face Amount	$ 300,000,000.0
Secured Long-term Debt, Noncurrent		$ 297,500,000
Senior Notes, Current
Senior Notes, Noncurrent	$ 297,800,000
Debt Instrument, Interest Rate, Stated Percentage	3.85%
Senior Unsecured Notes 2026 [Member] [Domain]
Debt Instrument [Line Items]
Senior Notes, Current