Debt	9 Months Ended
Sep. 30, 2021
Debt Disclosure [Abstract]
Debt	11. Debt (a) Senior Notes On August 13, 2021, Alleghany completed a public offering of $500.0 million aggregate principal amount of its 3.250% senior notes due on August 15, 2051 (the “2051 Senior Notes”). The 2051 Senior Notes are unsecured and unsubordinated general obligations of Alleghany. Interest on the 2051 Senior Notes is payable semi-annually in arrears on February 15 and August 15 of each year, commencing February 15, 2022. The terms of the 2051 Senior Notes permit redemption prior to maturity. The indenture under which the 2051 Senior Notes were issued contains covenants that impose conditions on Alleghany’s ability to create liens on the capital stock of AIHL, TransRe or RSUI. The 2051 Senior Notes were issued at approximately 98.6 percent of par, resulting in proceeds after underwriting discount, commissions and other expenses of $487.5 million, and an effective yield of approximately 3.32 percent. Approximately $5.7 million of underwriting discount, commissions and other expenses were recorded as deferred charges, which are amortized over the life of the 2051 Senior Notes. Alleghany intends to use the net proceeds of this offering for general corporate purposes, which may include the repayment at maturity of the 4.95% senior notes due 2022. See Note 8 to Notes to Consolidated Financial Statements set forth in Part II, Item 8, “Financial Statements and Supplementary Data” of the 2020 Form 10-K for additional information on the 4.95% senior notes due 2022 and other Alleghany senior notes outstanding. (b) Alleghany Capital Operating Subsidiaries The debt associated with Alleghany Capital’s operating subsidiaries totaled $485.6 million and $556.9 million as of September 30, 2021 and December 31, 2020, respectively, and is generally used to support working capital needs and to help finance acquisitions. As of September 30, 2021, the $485.6 million included:  $244.2 million of borrowings by Jazwares under its available credit facilities to support its seasonal working capital requirements and borrowings incurred and assumed from its acquisitions in 2019 and 2020;  $69.8 million of borrowings by Wilbert under its available credit facility and term loans;  $67.8 million of term loans at Kentucky Trailer primarily related to borrowings to finance small acquisitions, including its acquisition of a controlling interest in two manufacturers of aluminum feed transportation equipment in 2018 and 2019, and borrowings under its available credit facilities;  $34.7 million of borrowings by IPS under its available credit facility and term loans, in part to finance a small acquisition in 2019;  $32.2 million of term loans at Piedmont primarily related to borrowings to finance the acquisition of WPS in 2021;  $24.7 million of term loans at PCT primarily related to borrowings to finance the acquisition of a waterjet orifice and nozzle manufacturer in 2016 and the acquisition of a consumable cutting tool manufacturer in 2019; and  $12.2 million borrowings by W&W\|AFCO Steel under its available credit facilities and term loans. None of the above liabilities are guaranteed by Alleghany or Alleghany Capital. In December 2019, third-party, floating-rate term loans at Concord were repaid and replaced with approximately $33 million of intercompany floating-rate debt funded by the Alleghany parent company. The intercompany debt and related interest expenses are eliminated at the Alleghany consolidated level.

On August 13, 2021, Alleghany completed a public offering of $500.0 million aggregate principal amount of its 3.250% senior notes due on August 15, 2051 (the “2051 Senior Notes”). The 2051 Senior Notes are unsecured and unsubordinated general obligations of Alleghany. Interest on the 2051 Senior Notes is payable semi-annually in arrears on February 15 and August 15 of each year, commencing February 15, 2022. The terms of the 2051 Senior Notes permit redemption prior to maturity. The indenture under which the 2051 Senior Notes were issued contains covenants that impose conditions on Alleghany’s ability to create liens on the capital stock of AIHL, TransRe or RSUI. The 2051 Senior Notes were issued at approximately 98.6 percent of par, resulting in proceeds after underwriting discount, commissions and other expenses of $487.5 million, and an effective yield of approximately 3.32 percent. Approximately $5.7 million of underwriting discount, commissions and other expenses were recorded as deferred charges, which are amortized over the life of the 2051 Senior Notes. Alleghany intends to use the net proceeds of this offering for general corporate purposes, which may include the repayment at maturity of the 4.95% senior notes due 2022.

See Note 8 to Notes to Consolidated Financial Statements set forth in Part II, Item 8, “Financial Statements and Supplementary Data” of the 2020 Form 10-K for additional information on the 4.95% senior notes due 2022 and other Alleghany senior notes outstanding.

The debt associated with Alleghany Capital’s operating subsidiaries totaled $485.6 million and $556.9 million as of September 30, 2021 and December 31, 2020, respectively, and is generally used to support working capital needs and to help finance acquisitions. As of September 30, 2021, the $485.6 million included:

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$244.2 million of borrowings by Jazwares under its available credit facilities to support its seasonal working capital requirements and borrowings incurred and assumed from its acquisitions in 2019 and 2020;

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$69.8 million of borrowings by Wilbert under its available credit facility and term loans;

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$67.8 million of term loans at Kentucky Trailer primarily related to borrowings to finance small acquisitions, including its acquisition of a controlling interest in two manufacturers of aluminum feed transportation equipment in 2018 and 2019, and borrowings under its available credit facilities;

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$34.7 million of borrowings by IPS under its available credit facility and term loans, in part to finance a small acquisition in 2019;

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$32.2 million of term loans at Piedmont primarily related to borrowings to finance the acquisition of WPS in 2021;

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$24.7 million of term loans at PCT primarily related to borrowings to finance the acquisition of a waterjet orifice and nozzle manufacturer in 2016 and the acquisition of a consumable cutting tool manufacturer in 2019; and

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$12.2 million borrowings by W&W|AFCO Steel under its available credit facilities and term loans.

None of the above liabilities are guaranteed by Alleghany or Alleghany Capital. In December 2019, third-party, floating-rate term loans at Concord were repaid and replaced with approximately $33 million of intercompany floating-rate debt funded by the Alleghany parent company. The intercompany debt and related interest expenses are eliminated at the Alleghany consolidated level.