As of November 18, 2023, we were in compliance with all covenants and expect to remain in compliance with all covenants under our borrowing arrangements.
Our adjusted debt to earnings before interest, taxes, depreciation, amortization, rent and share-based compensation expense (“EBITDAR”) ratio was 2.5:1 as of November 18, 2023 and was 2.2:1 as of November 19, 2022. We calculate adjusted debt as the sum of total debt, financing lease liabilities and rent times six; and we calculate EBITDAR by adding interest, taxes, depreciation, amortization, rent, and share-based compensation expense to net income. Adjusted debt to EBITDAR is calculated on a trailing four quarter basis. We target our debt levels to a ratio of adjusted debt to EBITDAR in order to maintain our investment grade credit ratings. We believe this is important information for the management of our debt levels. To the extent EBITDAR increases, we expect our debt levels to increase; conversely, if EBITDAR decreases, we would expect our debt levels to decrease. Refer to the “Reconciliation of Non-GAAP Financial Measures” section for further details of our calculation.
Stock Repurchases
From January 1, 1998 to November 18, 2023, we have repurchased a total of 154.6 million shares of our common stock at an aggregate cost of $35.3 billion, including 579.7 thousand shares of our common stock at an aggregate cost of $1.5 billion (inclusive of excise tax of $14.4 million) during the twelve week period ended November 18, 2023. The excise tax is assessed at one percent of the fair market value of net stock repurchases after December 31, 2022.
On June 14, 2023, the Board voted to authorize the repurchase of an additional $2.0 billion of our common stock in connection with our ongoing share repurchase program, which raised the total value of shares authorized to be repurchased to $35.7 billion. Considering the cumulative repurchases as of November 18, 2023, we had $333.1 million remaining under the Board’s authorization to repurchase our common stock.
Subsequent to November 18, 2023 and through December 11, 2023, we have repurchased 40.1 thousand shares of our common stock at an aggregate cost of $106.0 million.
Off-Balance Sheet Arrangements
Since our fiscal year end, we have canceled, issued and modified stand-by letters of credit that are primarily renewed on an annual basis to cover deductible payments to our casualty insurance carriers. Our total stand-by letters of credit commitment at November 18, 2023, was $147.2 million, compared with $134.0 million at August 26, 2023, and our total surety bonds commitment at November 18, 2023, was $43.4 million, compared with $43.1 million at August 26, 2023.
Financial Commitments
Except for the previously discussed Revolving Credit Agreement, the $500 million 6.250% Senior Notes due November 2028 and $500 million 6.550% Senior Notes due November 2033 debt issuances, and the $76.9 million net decrease in commercial paper, there were no significant changes to our contractual obligations as described in our Annual Report on Form 10-K for the year ended August 26, 2023.
Reconciliation of Non-GAAP Financial Measures
Management’s Discussion and Analysis of Financial Condition and Results of Operations includes certain financial measures not derived in accordance with GAAP, including Adjusted After-Tax ROIC and Adjusted Debt to EBITDAR. Non-GAAP financial measures should not be used as a substitute for GAAP financial measures, or considered in isolation, for the purpose of analyzing our operating performance, financial position or cash flows. However, we have presented non-GAAP financial measures, as we believe they provide additional information that is useful to investors. Additionally, our management uses these non-GAAP financial measures to review and assess our underlying operating results and the Compensation Committee of the Board uses select measures to determine payments of performance-based compensation against pre-established targets.