S-K 1603(a)(9) Restrictions on Selling Securities	Sep. 26, 2025
SPAC Sponsor and Affiliates Information, Restrictions on Sale of SPAC Securities [Line Items]
SPAC Sponsor, Terms That Would Result in Earlier Expiration of Restrictions [Text Block]	In addition, in order to facilitate our initial business combination or for any other reason determined by our sponsor in its sole discretion, our sponsor may surrender or forfeit, transfer or exchange our founder shares, private placement units or any of our other securities, including for no consideration, as well as subject any such securities to earn-outs or other restrictions, or otherwise amend the terms of any such securities or enter into any other arrangements with respect to any such securities.
Founder Shares [Member]
SPAC Sponsor and Affiliates Information, Restrictions on Sale of SPAC Securities [Line Items]
SPAC Sponsor, Description of Expiration Dates of Restrictions [Text Block]	The earlier of (i) six months after the completion of our initial business combination or (ii) the date following the completion of our initial business combination on which we complete a liquidation, merger, share exchange or other similar transaction that results in all of our shareholders having the right to exchange their ordinary shares for cash, securities or other property. Notwithstanding the foregoing, if the closing price of our Class A ordinary shares equals or exceeds $12.00 per share (as adjusted for share sub-divisions, share capitalizations, reorganizations, recapitalizations and the like) for any 20 trading days within any 30-trading day period commencing at least 150 days after our initial business combination, the founder shares will be released from the lockup
SPAC Sponsor, Persons and Entities Subject to Restrictions	IG SPAC Sponsor LLC Andrew McLean Jim Campbell Michael Krawchuk David Dusseault Eric Luo Jing Nealis Francisco Sánchez
SPAC Sponsor, Description of Exceptions to Restrictions [Text Block]	Transfers permitted (a) to our officers, directors, advisors or consultants, any affiliate or family member of any of our officers, directors, advisors or consultants, any members or partners of the sponsor or their affiliates and funds and accounts advised by such members or partners, any affiliates of the sponsor, or any employees of such affiliates, (b) in the case of an individual, as a gift to such person’s immediate family or to a trust, the beneficiary of which is a member of such person’s immediate family, an affiliate of such person or to a charitable organization; (c) in the case of an individual, by virtue of laws of descent and distribution upon death of such person; (d) in the case of an individual, pursuant to a qualified domestic relations order; (e) by private sales or transfers made in connection with any forward purchase agreement or similar arrangement, in connection with an extension of the completion window or in connection with the consummation of a business combination at prices no greater than the price at which the shares or Share Rights were originally purchased; (f) pro rata distributions from our sponsor to its respective members, partners or shareholders pursuant to our sponsor’s limited liability company agreement or other charter documents; (g) by virtue of the laws of the Cayman Islands or our sponsor’s limited liability company agreement upon dissolution of our sponsor, (h) in the event of our liquidation prior to our consummation of our initial business combination; (i) in the event that, subsequent to our consummation of an initial business combination, we complete a liquidation, merger, share exchange or other similar transaction which results in all of our shareholders having the right to exchange their Class A ordinary shares for cash, securities or other property or (j) to a nominee or custodian of a person or entity to whom a transfer would be permissible under clauses (a) through (g); provided, however, that in the case of clauses (a) through (g) and clause (j) these permitted transferees must enter into a written agreement agreeing to be bound by these transfer restrictions and the other restrictions contained in the letter agreements
Private Placement Units [Member]
SPAC Sponsor and Affiliates Information, Restrictions on Sale of SPAC Securities [Line Items]
SPAC Sponsor, Description of Expiration Dates of Restrictions [Text Block]	30 days after the completion of our initial business combination
SPAC Sponsor, Persons and Entities Subject to Restrictions	IG SPAC Sponsor LLC
SPAC Sponsor, Description of Exceptions to Restrictions [Text Block]	Same as above
Any units, Share Rights, Ordinary Shares [Member]
SPAC Sponsor and Affiliates Information, Restrictions on Sale of SPAC Securities [Line Items]
SPAC Sponsor, Description of Expiration Dates of Restrictions [Text Block]	180 days after the date of this prospectus
SPAC Sponsor, Persons and Entities Subject to Restrictions	IG SPAC Sponsor LLC Andrew McLean Jim Campbell Michael Krawchuk David Dusseault Eric Luo Jing Nealis Francisco Sánchez
SPAC Sponsor, Description of Exceptions to Restrictions [Text Block]	CCM, as the representative of the underwriters in this offering, in its sole discretion may release any of the securities subject to these lock-up agreements at any time with prior written consent. These transfer restrictions will not apply to transfers to the sponsor by the officers and directors. Our initial shareholders, officers and directors are also subject to separate transfer restrictions on their founder shares and private placement units pursuant to the letter agreement described in the immediately preceding paragraphs.

S-K 1603(a)(9) Restrictions on Selling Securities

Sep. 26, 2025

SPAC Sponsor and Affiliates Information, Restrictions on Sale of SPAC Securities [Line Items]

SPAC Sponsor, Terms That Would Result in Earlier Expiration of Restrictions [Text Block]

In addition, in order to facilitate our initial business combination or for any other reason determined by our sponsor in its sole discretion, our sponsor may surrender or forfeit, transfer or exchange our founder shares, private placement units or any of our other securities, including for no consideration, as well as subject any such securities to earn-outs or other restrictions, or otherwise amend the terms of any such securities or enter into any other arrangements with respect to any such securities.

Founder Shares [Member]

SPAC Sponsor and Affiliates Information, Restrictions on Sale of SPAC Securities [Line Items]

SPAC Sponsor, Description of Expiration Dates of Restrictions [Text Block]

The earlier of (i) six months after the completion of our initial business combination or (ii) the date following the completion of our initial business combination on which we complete a liquidation, merger, share exchange or other similar transaction that results in all of our shareholders having the right to exchange their ordinary shares for cash, securities or other property. Notwithstanding the foregoing, if the closing price of our Class A ordinary shares equals or exceeds $12.00 per share (as adjusted for share sub-divisions, share capitalizations, reorganizations, recapitalizations and the like) for any 20 trading days within any 30-trading day period commencing at least 150 days after our initial business combination, the founder shares will be released from the lockup

SPAC Sponsor, Persons and Entities Subject to Restrictions

IG SPAC Sponsor LLC Andrew McLean Jim Campbell Michael Krawchuk David Dusseault Eric Luo Jing Nealis Francisco Sánchez

SPAC Sponsor, Description of Exceptions to Restrictions [Text Block]

Transfers permitted (a) to our officers, directors, advisors or consultants, any affiliate or family member of any of our officers, directors, advisors or consultants, any members or partners of the sponsor or their affiliates and funds and accounts advised by such members or partners, any affiliates of the sponsor, or any employees of such affiliates, (b) in the case of an individual, as a gift to such person’s immediate family or to a trust, the beneficiary of which is a member of such person’s immediate family, an affiliate of such person or to a charitable organization; (c) in the case of an individual, by virtue of laws of descent and distribution upon death of such person; (d) in the case of an individual, pursuant to a qualified domestic relations order; (e) by private sales or transfers made in connection with any forward purchase agreement or similar arrangement, in connection with an extension of the completion window or in connection with the consummation of a business combination at prices no greater than the price at which the shares or Share Rights were originally purchased; (f) pro rata distributions from our sponsor to its respective members, partners or shareholders pursuant to our sponsor’s limited liability company agreement or other charter documents; (g) by virtue of the laws of the Cayman Islands or our sponsor’s limited liability company agreement upon dissolution of our sponsor, (h) in the event of our liquidation prior to our consummation of our initial business combination; (i) in the event that, subsequent to our consummation of an initial business combination, we complete a liquidation, merger, share exchange or other similar transaction which results in all of our shareholders having the right to exchange their Class A ordinary shares for cash, securities or other property or (j) to a nominee or custodian of a person or entity to whom a transfer would be permissible under clauses (a) through (g); provided, however, that in the case of clauses (a) through (g) and clause (j) these permitted transferees must enter into a written agreement agreeing to be bound by these transfer restrictions and the other restrictions contained in the letter agreements

Private Placement Units [Member]

SPAC Sponsor and Affiliates Information, Restrictions on Sale of SPAC Securities [Line Items]

SPAC Sponsor, Description of Expiration Dates of Restrictions [Text Block]

30 days after the completion of our initial business combination

SPAC Sponsor, Persons and Entities Subject to Restrictions

IG SPAC Sponsor LLC

SPAC Sponsor, Description of Exceptions to Restrictions [Text Block]

Same as above

Any units, Share Rights, Ordinary Shares [Member]

SPAC Sponsor and Affiliates Information, Restrictions on Sale of SPAC Securities [Line Items]

SPAC Sponsor, Description of Expiration Dates of Restrictions [Text Block]

180 days after the date of this prospectus

SPAC Sponsor, Persons and Entities Subject to Restrictions

IG SPAC Sponsor LLC Andrew McLean Jim Campbell Michael Krawchuk David Dusseault Eric Luo Jing Nealis Francisco Sánchez

SPAC Sponsor, Description of Exceptions to Restrictions [Text Block]

CCM, as the representative of the underwriters in this offering, in its sole discretion may release any of the securities subject to these lock-up agreements at any time with prior written consent. These transfer restrictions will not apply to transfers to the sponsor by the officers and directors. Our initial shareholders, officers and directors are also subject to separate transfer restrictions on their founder shares and private placement units pursuant to the letter agreement described in the immediately preceding paragraphs.