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Pay vs Performance Disclosure | 12 Months Ended
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Dec. 31, 2023 USD ($) $ / shares | Dec. 31, 2022 USD ($) $ / shares | Dec. 31, 2021 USD ($) $ / shares | Dec. 31, 2020 USD ($) $ / shares
Pay vs Performance Disclosure [Table] |  |  |  |  |
Pay vs Performance [Table Text Block] |  | ##### Pay Versus Performance Table
|  |  |  |  |  |  |  | Average Summary |  |  | Average |  |  | Value of Initial Fixed $100 Investment Based On:(4) |  |  |  |  |  |  |
Year(1) |  | Summary Compensation Table Total for PEO ($)(2) |  |  | Compensation Actually Paid to PEO ($)(3) |  |  | Compensation Table Total for Non-PEO Named Executive Officers ($)(2) |  |  | Compensation Actually Paid to Non-PEO Named Executive Officers ($)(3) |  |  | Total Shareholder Return ($) |  |  | Peer Group Total Shareholder Return ($)(5) |  |  | Net Income ($) (In Millions) |  |  | Adjusted EPS ($)(6) |
2023 |  |  | 9,020,376 |  |  |  | 15,920,805 |  |  |  | 3,150,463 |  |  |  | 5,475,996 |  |  |  | 166.67 |  |  |  | 210.85 |  |  |  | 1,104.3 |  |  |  | 9.88 |
2022 |  |  | 11,115,822 |  |  |  | 8,268,497 |  |  |  | 4,086,715 |  |  |  | 3,268,287 |  |  |  | 129.37 |  |  |  | 134.82 |  |  |  | 1,114.5 |  |  |  | 9.86 |
2021 |  |  | 8,943,903 |  |  |  | 31,050,119 |  |  |  | 4,110,659 |  |  |  | 10,625,364 |  |  |  | 146.60 |  |  |  | 189.64 |  |  |  | 988.6 |  |  |  | 7.96 |
2020 |  |  | 6,342,674 |  |  |  | 7,997,553 |  |  |  | 2,621,777 |  |  |  | 3,090,886 |  |  |  | 93.45 |  |  |  | 142.21 |  |  |  | 788.5 |  |  |  | 6.59 |
(1) | Ms. Leahy has served as the Principal Executive Officer (“PEO”) for the entirety of 2023, 2022, 2021 and 2020 and our other NEOs for the applicable years were as follows:
| • | 2022 and 2023: Albert J. Miralles; Sona Chawla; Christina M. Corley; and Frederick J. Kulevich.
| • | 2021: Albert J. Miralles; Sona Chawla; Christina M. Corley; Elizabeth H. Connelly; and Collin B. Kebo.
| • | 2020: Collin B. Kebo; Sona Chawla; Christina M. Corley; Douglas E. Eckrote; Mark C. Chong; and Elizabeth H. Connelly
(2) | Amounts reported in this column represent (i) the total compensation reported in the SCT for the applicable year in the case of Ms. Leahy and (ii) the average of the total compensation reported in the SCT for the applicable year for our other NEOs reported for the applicable year other than Ms. Leahy.
(3) | To calculate CAP, adjustments were made to the amounts reported in the SCT for the applicable year. The CAP amounts from 2020 to 2022 have been updated from the amounts reported in the 2023 proxy statement to reflect the application of the performance modifier to dividend accruals as the dividend accruals were previously reported based on a target payout. The primary difference between the calculation of SCT total compensation and CAP relates to the calculation of stock and option awards:
(4) | Pursuant to rules of the SEC, the comparison assumes $100 was invested on December 31, 2019. Historic stock price performance is not necessarily indicative of future stock price performance.
(5) | The TSR Peer Group consists of S&P 500 IT Index.
(6) | The Company determined that adjusted EPS is the most important financial performance measure used to link CAP to Company performance given it impacts the vesting of 50% of the PSUs and also encompasses non-GAAP operating income performance, the primary financial measure under our SMIP. In addition, we believe that over the long-term, our earnings per share is the most significant driver of CDW’s stock price performance, which impacts the value of equity awards granted to the NEOs, the largest component of our executive compensation program. Adjusted EPS is defined as non-GAAP net income plus/minus extraordinary, non-recurring items divided by the weighted average common shares outstanding on a diluted basis. For purposes of determining adjusted EPS, non-GAAP net income is defined as net income, adjusted for the items set forth in the Company’s earnings releases which may include, among other items, amortization of intangibles, non-cash equity-based compensation and associated taxes, losses or gains from the extinguishment of debt and acquisition and integration expenses. The amount reported for each reporting year in this table represents the adjusted EPS, as calculated for the first year of the PSU performance cycle that commenced in the applicable reporting year.
(1) | Ms. Leahy has served as the Principal Executive Officer (“PEO”) for the entirety of 2023, 2022, 2021 and 2020 and our other NEOs for the applicable years were as follows:
| • | 2022 and 2023: Albert J. Miralles; Sona Chawla; Christina M. Corley; and Frederick J. Kulevich.
| • | 2021: Albert J. Miralles; Sona Chawla; Christina M. Corley; Elizabeth H. Connelly; and Collin B. Kebo.
| • | 2020: Collin B. Kebo; Sona Chawla; Christina M. Corley; Douglas E. Eckrote; Mark C. Chong; and Elizabeth H. Connelly
(2) | Amounts reported in this column represent (i) the total compensation reported in the SCT for the applicable year in the case of Ms. Leahy and (ii) the average of the total compensation reported in the SCT for the applicable year for our other NEOs reported for the applicable year other than Ms. Leahy.
(3) | To calculate CAP, adjustments were made to the amounts reported in the SCT for the applicable year. The CAP amounts from 2020 to 2022 have been updated from the amounts reported in the 2023 proxy statement to reflect the application of the performance modifier to dividend accruals as the dividend accruals were previously reported based on a target payout. The primary difference between the calculation of SCT total compensation and CAP relates to the calculation of stock and option awards:
SCT CALCULATION IS BASED ON: |  | CAP CALCULATION IS BASED ON:
Grant date fair value of stock and option awards granted during the year |  | Year over year change in the fair value of stock and option awards that are unvested as of the end of the year, or vested or were forfeited during the year
A reconciliation of the adjustments for Ms. Leahy and for the average of the other NEOs is set forth in the table below.
Year |  | Summary Compensation Table Total ($)(a) |  |  | (Minus) Grant Date Fair Value of Stock Option and Stock Awards Granted in Fiscal Year ($)(b) |  |  | Plus Fair Value at Fiscal Year-End of Outstanding and Unvested Stock Option and Stock Awards Granted in Fiscal Year ($)(c) |  |  | Plus/(Minus) Change in Fair Value of Outstanding and Unvested Stock Option and Stock Awards Granted in Prior Fiscal Years ($)(d) |  |  | Plus Fair Value at Vesting of Stock Option and Stock Awards Granted in Fiscal Year that Vested During Fiscal Year ($)(e) |  |  | Plus/(Minus) Change in Fair Value as of Vesting Date of Stock Option and Stock Awards Granted in Prior Years for which Applicable Vesting Conditions were Satisfied During Fiscal Year ($)(f) |  |  | (Minus) Fair Value as of Prior Fiscal Year-End of Stock Option and Stock Awards Granted in Prior Fiscal Years that Failed to Meet Applicable Vesting Conditions During Fiscal Year ($)(g) |  |  | Equals Compensation Actually Paid ($) |
PEO |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2023 |  |  | 9,020,376 |  |  |  | (7,999,999 | ) |  |  | 8,165,402 |  |  |  | 3,658,558 |  |  |  | — |  |  |  | 3,076,468 |  |  |  | — |  |  |  | 15,920,805 |
2022 |  |  | 11,115,822 |  |  |  | (7,036,821 | ) |  |  | 9,049,451 |  |  |  | (2,192,164 | ) |  |  | — |  |  |  | (2,667,791 | ) |  |  | — |  |  |  | 8,268,497 |
2021 |  |  | 8,943,903 |  |  |  | (5,573,117 | ) |  |  | 12,234,207 |  |  |  | 11,647,411 |  |  |  | — |  |  |  | 3,797,715 |  |  |  | — |  |  |  | 31,050,119 |
2020 |  |  | 6,342,674 |  |  |  | (4,099,541 | ) |  |  | 6,610,535 |  |  |  | 379,714 |  |  |  | — |  |  |  | (1,235,829 | ) |  |  | — |  |  |  | 7,997,553 |
Other NEOs (Average)(h) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2023 |  |  | 3,150,463 |  |  |  | (2,509,987 | ) |  |  | 2,561,884 |  |  |  | 1,261,578 |  |  |  | — |  |  |  | 1,012,058 |  |  |  | — |  |  |  | 5,475,996 |
2022 |  |  | 4,086,715 |  |  |  | (2,374,897 | ) |  |  | 3,055,924 |  |  |  | (756,115 | ) |  |  | — |  |  |  | (743,340 | ) |  |  | — |  |  |  | 3,268,287 |
2021 |  |  | 4,110,659 |  |  |  | (2,348,185 | ) |  |  | 4,375,342 |  |  |  | 3,628,212 |  |  |  | — |  |  |  | 859,336 |  |  |  | — |  |  |  | 10,625,364 |
2020 |  |  | 2,621,777 |  |  |  | (1,488,976 | ) |  |  | 2,337,627 |  |  |  | 56,279 |  |  |  | — |  |  |  | (435,821 | ) |  |  | — |  |  |  | 3,090,886 |
| (a) | Represents Total Compensation as reported in the SCT for the indicated fiscal year. For the other NEOs, amounts shown represent averages.
| (b) | Represents the grant date fair value of the stock option and stock awards granted during the indicated fiscal year, calculated in accordance with ASC718. See Note 13 to the Audited Financial Statements included in our Form 10-K for the fiscal year ended December 31, 2023 for a discussion of the relevant assumptions used in calculating these amounts.
| (c) | Represents the fair value as of the indicated fiscal year-end of the outstanding and unvested option awards and stock awards granted during such fiscal year, calculated in accordance with the methodology used for financial reporting purposes, including the value associated with the accrual of any dividend equivalent rights. For awards subject to performance-based vesting conditions, the value is based on an estimate of the probable outcome of such performance-based vesting conditions as of the last day of the fiscal year, which is consistent the same methodology used to determine the grant date fair value of the awards. See Note 13 to the Audited Financial Statements included in our Form 10-K for the fiscal year ended December 31, 2023 for a discussion of the relevant assumptions used in calculating these amounts.
| (d) | Represents the change in fair value during the indicated fiscal year of each option award and stock award that was granted in a prior fiscal year and that remained outstanding and unvested as of the last day of the indicated fiscal year, calculated in accordance with the methodology used for financial reporting purposes, including the value associated with the accrual of any dividend equivalent rights. For awards subject to performance-based vesting conditions, the value is based on an estimate of the probable outcome of such performance-based vesting conditions as of the last day of the fiscal year, which is consistent the same methodology used to determine the grant date fair value of the awards. See Note 13 to the Audited Financial Statements included in our Form 10-K for the fiscal year ended December 31, 2023 for a discussion of the relevant assumptions used in calculating these amounts.
| (e) | Represents the fair value at vesting of the option awards and stock awards that were granted and vested during the indicated fiscal year, calculated in accordance with the methodology used for financial reporting purposes, including the value associated with the accrual of any dividend equivalent rights, and reflects the actual attainment level for the PSUs that vested on December 31st of the applicable year, as discussed in the CD&A with respect to the PSUs that vested on December 31, 2023.
| (f) | Represents the change in fair value, measured from the prior fiscal year-end to the vesting date, of each option award and stock award that was granted in a prior fiscal year and which vested during the indicated fiscal year, calculated in accordance with the methodology used for financial reporting purposes, including the value associated with the accrual of any dividend equivalent rights.
| (g) | Represents the fair value as of the last day of the prior fiscal year of the option award and stock awards that were granted in a prior fiscal year and which failed to meet the applicable vesting conditions in the indicated fiscal year, calculated in accordance with the methodology used for financial reporting purposes.
| (h) | See footnote 1 above for the NEOs included in the average for each year.
(4) | Pursuant to rules of the SEC, the comparison assumes $100 was invested on December 31, 2019. Historic stock price performance is not necessarily indicative of future stock price performance.
(5) | The TSR Peer Group consists of S&P 500 IT Index.
(6) | The Company determined that adjusted EPS is the most important financial performance measure used to link CAP to Company performance given it impacts the vesting of 50% of the PSUs and also encompasses non-GAAP operating income performance, the primary financial measure under our SMIP. In addition, we believe that over the long-term, our earnings per share is the most significant driver of CDW’s stock price performance, which impacts the value of equity awards granted to the NEOs, the largest component of our executive compensation program. Adjusted EPS is defined as non-GAAP net income plus/minus extraordinary, non-recurring items divided by the weighted average common shares outstanding on a diluted basis. For purposes of determining adjusted EPS, non-GAAP net income is defined as net income, adjusted for the items set forth in the Company’s earnings releases which may include, among other items, amortization of intangibles, non-cash equity-based compensation and associated taxes, losses or gains from the extinguishment of debt and acquisition and integration expenses. The amount reported for each reporting year in this table represents the adjusted EPS, as calculated for the first year of the PSU performance cycle that commenced in the applicable reporting year.
Company Selected Measure Name |  | adjusted EPS |  |  |
Named Executive Officers, Footnote [Text Block] |  |
(1) | Ms. Leahy has served as the Principal Executive Officer (“PEO”) for the entirety of 2023, 2022, 2021 and 2020 and our other NEOs for the applicable years were as follows:
| • | 2022 and 2023: Albert J. Miralles; Sona Chawla; Christina M. Corley; and Frederick J. Kulevich.
| • | 2021: Albert J. Miralles; Sona Chawla; Christina M. Corley; Elizabeth H. Connelly; and Collin B. Kebo.
| • | 2020: Collin B. Kebo; Sona Chawla; Christina M. Corley; Douglas E. Eckrote; Mark C. Chong; and Elizabeth H. Connelly
Peer Group Issuers, Footnote [Text Block] |  | The TSR Peer Group consists of S&P 500 IT Index. |  |  |
PEO Total Compensation Amount | [1],[2],[3] | $ 9,020,376 | $ 11,115,822 | $ 8,943,903 | $ 6,342,674
PEO Actually Paid Compensation Amount | [2],[4] | $ 15,920,805 | 8,268,497 | 31,050,119 | 7,997,553
Adjustment To PEO Compensation, Footnote [Text Block] |  | A reconciliation of the adjustments for Ms. Leahy and for the average of the other NEOs is set forth in the table below.
Year |  | Summary Compensation Table Total ($)(a) |  |  | (Minus) Grant Date Fair Value of Stock Option and Stock Awards Granted in Fiscal Year ($)(b) |  |  | Plus Fair Value at Fiscal Year-End of Outstanding and Unvested Stock Option and Stock Awards Granted in Fiscal Year ($)(c) |  |  | Plus/(Minus) Change in Fair Value of Outstanding and Unvested Stock Option and Stock Awards Granted in Prior Fiscal Years ($)(d) |  |  | Plus Fair Value at Vesting of Stock Option and Stock Awards Granted in Fiscal Year that Vested During Fiscal Year ($)(e) |  |  | Plus/(Minus) Change in Fair Value as of Vesting Date of Stock Option and Stock Awards Granted in Prior Years for which Applicable Vesting Conditions were Satisfied During Fiscal Year ($)(f) |  |  | (Minus) Fair Value as of Prior Fiscal Year-End of Stock Option and Stock Awards Granted in Prior Fiscal Years that Failed to Meet Applicable Vesting Conditions During Fiscal Year ($)(g) |  |  | Equals Compensation Actually Paid ($) |
PEO |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2023 |  |  | 9,020,376 |  |  |  | (7,999,999 | ) |  |  | 8,165,402 |  |  |  | 3,658,558 |  |  |  | — |  |  |  | 3,076,468 |  |  |  | — |  |  |  | 15,920,805 |
2022 |  |  | 11,115,822 |  |  |  | (7,036,821 | ) |  |  | 9,049,451 |  |  |  | (2,192,164 | ) |  |  | — |  |  |  | (2,667,791 | ) |  |  | — |  |  |  | 8,268,497 |
2021 |  |  | 8,943,903 |  |  |  | (5,573,117 | ) |  |  | 12,234,207 |  |  |  | 11,647,411 |  |  |  | — |  |  |  | 3,797,715 |  |  |  | — |  |  |  | 31,050,119 |
2020 |  |  | 6,342,674 |  |  |  | (4,099,541 | ) |  |  | 6,610,535 |  |  |  | 379,714 |  |  |  | — |  |  |  | (1,235,829 | ) |  |  | — |  |  |  | 7,997,553 |
Other NEOs (Average)(h) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2023 |  |  | 3,150,463 |  |  |  | (2,509,987 | ) |  |  | 2,561,884 |  |  |  | 1,261,578 |  |  |  | — |  |  |  | 1,012,058 |  |  |  | — |  |  |  | 5,475,996 |
2022 |  |  | 4,086,715 |  |  |  | (2,374,897 | ) |  |  | 3,055,924 |  |  |  | (756,115 | ) |  |  | — |  |  |  | (743,340 | ) |  |  | — |  |  |  | 3,268,287 |
2021 |  |  | 4,110,659 |  |  |  | (2,348,185 | ) |  |  | 4,375,342 |  |  |  | 3,628,212 |  |  |  | — |  |  |  | 859,336 |  |  |  | — |  |  |  | 10,625,364 |
2020 |  |  | 2,621,777 |  |  |  | (1,488,976 | ) |  |  | 2,337,627 |  |  |  | 56,279 |  |  |  | — |  |  |  | (435,821 | ) |  |  | — |  |  |  | 3,090,886 |
| (a) | Represents Total Compensation as reported in the SCT for the indicated fiscal year. For the other NEOs, amounts shown represent averages.
| (b) | Represents the grant date fair value of the stock option and stock awards granted during the indicated fiscal year, calculated in accordance with ASC718. See Note 13 to the Audited Financial Statements included in our Form 10-K for the fiscal year ended December 31, 2023 for a discussion of the relevant assumptions used in calculating these amounts.
| (c) | Represents the fair value as of the indicated fiscal year-end of the outstanding and unvested option awards and stock awards granted during such fiscal year, calculated in accordance with the methodology used for financial reporting purposes, including the value associated with the accrual of any dividend equivalent rights. For awards subject to performance-based vesting conditions, the value is based on an estimate of the probable outcome of such performance-based vesting conditions as of the last day of the fiscal year, which is consistent the same methodology used to determine the grant date fair value of the awards. See Note 13 to the Audited Financial Statements included in our Form 10-K for the fiscal year ended December 31, 2023 for a discussion of the relevant assumptions used in calculating these amounts.
| (d) | Represents the change in fair value during the indicated fiscal year of each option award and stock award that was granted in a prior fiscal year and that remained outstanding and unvested as of the last day of the indicated fiscal year, calculated in accordance with the methodology used for financial reporting purposes, including the value associated with the accrual of any dividend equivalent rights. For awards subject to performance-based vesting conditions, the value is based on an estimate of the probable outcome of such performance-based vesting conditions as of the last day of the fiscal year, which is consistent the same methodology used to determine the grant date fair value of the awards. See Note 13 to the Audited Financial Statements included in our Form 10-K for the fiscal year ended December 31, 2023 for a discussion of the relevant assumptions used in calculating these amounts.
| (e) | Represents the fair value at vesting of the option awards and stock awards that were granted and vested during the indicated fiscal year, calculated in accordance with the methodology used for financial reporting purposes, including the value associated with the accrual of any dividend equivalent rights, and reflects the actual attainment level for the PSUs that vested on December 31st of the applicable year, as discussed in the CD&A with respect to the PSUs that vested on December 31, 2023.
| (f) | Represents the change in fair value, measured from the prior fiscal year-end to the vesting date, of each option award and stock award that was granted in a prior fiscal year and which vested during the indicated fiscal year, calculated in accordance with the methodology used for financial reporting purposes, including the value associated with the accrual of any dividend equivalent rights.
| (g) | Represents the fair value as of the last day of the prior fiscal year of the option award and stock awards that were granted in a prior fiscal year and which failed to meet the applicable vesting conditions in the indicated fiscal year, calculated in accordance with the methodology used for financial reporting purposes.
| (h) | See footnote 1 above for the NEOs included in the average for each year.
Non-PEO NEO Average Total Compensation Amount | [1],[2],[3],[5] | $ 3,150,463 | 4,086,715 | 4,110,659 | 2,621,777
Non-PEO NEO Average Compensation Actually Paid Amount | [2],[4],[5] | $ 5,475,996 | 3,268,287 | 10,625,364 | 3,090,886
Adjustment to Non-PEO NEO Compensation Footnote [Text Block] |  | A reconciliation of the adjustments for Ms. Leahy and for the average of the other NEOs is set forth in the table below.
Year |  | Summary Compensation Table Total ($)(a) |  |  | (Minus) Grant Date Fair Value of Stock Option and Stock Awards Granted in Fiscal Year ($)(b) |  |  | Plus Fair Value at Fiscal Year-End of Outstanding and Unvested Stock Option and Stock Awards Granted in Fiscal Year ($)(c) |  |  | Plus/(Minus) Change in Fair Value of Outstanding and Unvested Stock Option and Stock Awards Granted in Prior Fiscal Years ($)(d) |  |  | Plus Fair Value at Vesting of Stock Option and Stock Awards Granted in Fiscal Year that Vested During Fiscal Year ($)(e) |  |  | Plus/(Minus) Change in Fair Value as of Vesting Date of Stock Option and Stock Awards Granted in Prior Years for which Applicable Vesting Conditions were Satisfied During Fiscal Year ($)(f) |  |  | (Minus) Fair Value as of Prior Fiscal Year-End of Stock Option and Stock Awards Granted in Prior Fiscal Years that Failed to Meet Applicable Vesting Conditions During Fiscal Year ($)(g) |  |  | Equals Compensation Actually Paid ($) |
PEO |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2023 |  |  | 9,020,376 |  |  |  | (7,999,999 | ) |  |  | 8,165,402 |  |  |  | 3,658,558 |  |  |  | — |  |  |  | 3,076,468 |  |  |  | — |  |  |  | 15,920,805 |
2022 |  |  | 11,115,822 |  |  |  | (7,036,821 | ) |  |  | 9,049,451 |  |  |  | (2,192,164 | ) |  |  | — |  |  |  | (2,667,791 | ) |  |  | — |  |  |  | 8,268,497 |
2021 |  |  | 8,943,903 |  |  |  | (5,573,117 | ) |  |  | 12,234,207 |  |  |  | 11,647,411 |  |  |  | — |  |  |  | 3,797,715 |  |  |  | — |  |  |  | 31,050,119 |
2020 |  |  | 6,342,674 |  |  |  | (4,099,541 | ) |  |  | 6,610,535 |  |  |  | 379,714 |  |  |  | — |  |  |  | (1,235,829 | ) |  |  | — |  |  |  | 7,997,553 |
Other NEOs (Average)(h) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2023 |  |  | 3,150,463 |  |  |  | (2,509,987 | ) |  |  | 2,561,884 |  |  |  | 1,261,578 |  |  |  | — |  |  |  | 1,012,058 |  |  |  | — |  |  |  | 5,475,996 |
2022 |  |  | 4,086,715 |  |  |  | (2,374,897 | ) |  |  | 3,055,924 |  |  |  | (756,115 | ) |  |  | — |  |  |  | (743,340 | ) |  |  | — |  |  |  | 3,268,287 |
2021 |  |  | 4,110,659 |  |  |  | (2,348,185 | ) |  |  | 4,375,342 |  |  |  | 3,628,212 |  |  |  | — |  |  |  | 859,336 |  |  |  | — |  |  |  | 10,625,364 |
2020 |  |  | 2,621,777 |  |  |  | (1,488,976 | ) |  |  | 2,337,627 |  |  |  | 56,279 |  |  |  | — |  |  |  | (435,821 | ) |  |  | — |  |  |  | 3,090,886 |
| (a) | Represents Total Compensation as reported in the SCT for the indicated fiscal year. For the other NEOs, amounts shown represent averages.
| (b) | Represents the grant date fair value of the stock option and stock awards granted during the indicated fiscal year, calculated in accordance with ASC718. See Note 13 to the Audited Financial Statements included in our Form 10-K for the fiscal year ended December 31, 2023 for a discussion of the relevant assumptions used in calculating these amounts.
| (c) | Represents the fair value as of the indicated fiscal year-end of the outstanding and unvested option awards and stock awards granted during such fiscal year, calculated in accordance with the methodology used for financial reporting purposes, including the value associated with the accrual of any dividend equivalent rights. For awards subject to performance-based vesting conditions, the value is based on an estimate of the probable outcome of such performance-based vesting conditions as of the last day of the fiscal year, which is consistent the same methodology used to determine the grant date fair value of the awards. See Note 13 to the Audited Financial Statements included in our Form 10-K for the fiscal year ended December 31, 2023 for a discussion of the relevant assumptions used in calculating these amounts.
| (d) | Represents the change in fair value during the indicated fiscal year of each option award and stock award that was granted in a prior fiscal year and that remained outstanding and unvested as of the last day of the indicated fiscal year, calculated in accordance with the methodology used for financial reporting purposes, including the value associated with the accrual of any dividend equivalent rights. For awards subject to performance-based vesting conditions, the value is based on an estimate of the probable outcome of such performance-based vesting conditions as of the last day of the fiscal year, which is consistent the same methodology used to determine the grant date fair value of the awards. See Note 13 to the Audited Financial Statements included in our Form 10-K for the fiscal year ended December 31, 2023 for a discussion of the relevant assumptions used in calculating these amounts.
| (e) | Represents the fair value at vesting of the option awards and stock awards that were granted and vested during the indicated fiscal year, calculated in accordance with the methodology used for financial reporting purposes, including the value associated with the accrual of any dividend equivalent rights, and reflects the actual attainment level for the PSUs that vested on December 31st of the applicable year, as discussed in the CD&A with respect to the PSUs that vested on December 31, 2023.
| (f) | Represents the change in fair value, measured from the prior fiscal year-end to the vesting date, of each option award and stock award that was granted in a prior fiscal year and which vested during the indicated fiscal year, calculated in accordance with the methodology used for financial reporting purposes, including the value associated with the accrual of any dividend equivalent rights.
| (g) | Represents the fair value as of the last day of the prior fiscal year of the option award and stock awards that were granted in a prior fiscal year and which failed to meet the applicable vesting conditions in the indicated fiscal year, calculated in accordance with the methodology used for financial reporting purposes.
| (h) | See footnote 1 above for the NEOs included in the average for each year.
Compensation Actually Paid vs. Total Shareholder Return [Text Block] |  | 2. CAP Versus TSR As shown in the chart below, the PEO’s and other NEOs’ CAP amounts align with the Company’s TSR over the four-year period reported in the chart. This is due primarily to the Company’s use of long-term incentives, the value of which are tied directly to stock price. As described in more detail in the CD&A, for 2023, 70% of the PEO’s target compensation is comprised on long-term incentives, including stock options and PSUs. CDW CAP vs. Total Shareholder Return |  |  |
Compensation Actually Paid vs. Net Income [Text Block] |  | 4. CAP Versus Net Income The chart below demonstrates the relationship between CAP amounts for our PEO and our other NEOs and our net income. Variations in the CAP amounts for our PEO and other NEOs are due in large part to the significant emphasis the Company places on long-term incentives, the value of which fluctuates most significantly based on the vesting level of our PSU awards and changes in stock price over time. CDW CAP vs. Net Income |  |  |
Compensation Actually Paid vs. Company Selected Measure [Text Block] |  | 3. CAP Versus Adjusted EPS (Company Selected Measure) The chart below demonstrates the relationship between CAP amounts for our PEO and our other NEOs and our adjusted EPS for the applicable fiscal year. Variations in the CAP amounts for our PEO and other NEOs are due in large part to the significant emphasis the Company places on long-term incentives, the value of which fluctuates most significantly based on the vesting level of our PSU awards and changes in stock price over time. Adjusted EPS is viewed as the most important financial measure to link CAP and Company performance given it impacts the vesting of 50% of the PSUs and it also encompasses non-GAAP operating income performance, the primary financial measure under our SMIP. In addition, we believe that over the long-term, our earnings per share is the most significant driver of CDW’s stock price performance, which impacts the value of equity awards granted to the PEO and other NEOs, the largest component of our executive compensation program. CDW CAP vs. Adjusted EPS |  |  |
Total Shareholder Return Vs Peer Group [Text Block] |  | 1. TSR: Company versus Peer Group As shown in the chart below, the Company’s four-year cumulative TSR for the period of 2020-2023 is less than the four-year cumulative TSR for companies included in our peer group TSR. Cumulative Total Shareholder Return: Company vs. Peer Group |  |  |
Tabular List [Table Text Block] |  | ##### Performance Measures Used to Link Company Performance and CAP to the NEOs The following is a list of financial performance measures, which in our assessment represent the most important measures used by the Company to link CAP for the NEOs in 2023. Please see the CD&A for a further description of these metrics, including how they are calculated for incentive purposes, and how they are used in the Company’s executive compensation program, including the SMIP and 2023 long-term incentive program.
Measure
CDW Stock Price
Adjusted EPS
Adjusted FCF
Non-GAAP Operating Income
Total Shareholder Return Amount | [2],[6] | $ 166.67 | 129.37 | 146.60 | 93.45
Peer Group Total Shareholder Return Amount | [2],[6],[7] | 210.85 | 134.82 | 189.64 | 142.21
Net Income (Loss) Attributable to Parent | [2] | $ 1,104,300,000 | $ 1,114,500,000 | $ 988,600,000 | $ 788,500,000
Company Selected Measure Amount | $ / shares | [2],[8] | 9.88 | 9.86 | 7.96 | 6.59
PEO Name |  | Ms. Leahy | Ms. Leahy | Ms. Leahy | Ms. Leahy
Additional 402(v) Disclosure [Text Block] |  | ### Pay Versus Performance Provided below is the Company’s “Pay Versus Performance” disclosure as required pursuant to Item 402(v) of Regulation S-K under the Exchange Act. As required by Item 402(v), we have included:
• | A list of the most important measures that our Compensation Committee used in 2023 to link pay calculated in accordance with Item 402(v) (referred to as “Compensation Actually Paid” or “CAP”) to Company performance;
• | A table that discloses the total compensation of our NEOs as presented in the Summary Compensation Table (“SCT”), CAP for our NEOs and specified performance measures for the 2020 to 2023 period; and
• | Graphs and narratives that describe:
| — | the relationship between our cumulative total shareholder return (“TSR”) and the TSR of the S&P 500 IT Index (“Peer Group TSR”); and
| — | the relationship between CAP and our TSR;
| — | the relationship between CAP and adjusted EPS, which is our Company Selected Measure (“CSM”); and
| — | the relationship between CAP and Net Income.
This disclosure has been prepared in accordance with Item 402(v) and does not necessarily reflect value actually realized by the NEOs or how the Compensation Committee evaluates compensation decisions in light of Company or individual performance. In particular, the Compensation Committee does not use CAP as a basis for making compensation decisions. Please refer to the CD&A section of this proxy statement for a discussion of our executive compensation program objectives and the ways in which we design our program to align executive compensation with Company performance. |  |  |
(Minus) Grant Date Fair Value of Stock Option and Stock Awards Granted in Fiscal Year | PEO [Member] |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |
Adjustment to Compensation Amount | [9] | $ (7,999,999) | $ (7,036,821) | $ (5,573,117) | $ (4,099,541)
(Minus) Grant Date Fair Value of Stock Option and Stock Awards Granted in Fiscal Year | Non-PEO NEO [Member] |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |
Adjustment to Compensation Amount | [5],[9] | (2,509,987) | (2,374,897) | (2,348,185) | (1,488,976)
Plus Fair Value at Fiscal Year-End of Outstanding and Unvested Stock Option and Stock Awards Granted in Fiscal Year | PEO [Member] |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |
Adjustment to Compensation Amount | [10] | 8,165,402 | 9,049,451 | 12,234,207 | 6,610,535
Plus Fair Value at Fiscal Year-End of Outstanding and Unvested Stock Option and Stock Awards Granted in Fiscal Year | Non-PEO NEO [Member] |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |
Adjustment to Compensation Amount | [5],[10] | 2,561,884 | 3,055,924 | 4,375,342 | 2,337,627
Plus/(Minus) Change in Fair Value of Outstanding and Unvested Stock Option and Stock Awards Granted in Prior Fiscal Years | PEO [Member] |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |
Adjustment to Compensation Amount | [11] | 3,658,558 | (2,192,164) | 11,647,411 | 379,714
Plus/(Minus) Change in Fair Value of Outstanding and Unvested Stock Option and Stock Awards Granted in Prior Fiscal Years | Non-PEO NEO [Member] |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |
Adjustment to Compensation Amount | [5],[11] | 1,261,578 | (756,115) | 3,628,212 | 56,279
Plus Fair Value at Vesting of Stock Option and Stock Awards Granted in Fiscal Year that Vested During Fiscal Year | PEO [Member] |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |
Adjustment to Compensation Amount | [12] |  |  |  |
Plus Fair Value at Vesting of Stock Option and Stock Awards Granted in Fiscal Year that Vested During Fiscal Year | Non-PEO NEO [Member] |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |
Adjustment to Compensation Amount | [5],[12] |  |  |  |
Plus/(Minus) Change in Fair Value as of Vesting Date of Stock Option and Stock Awards Granted in Prior Years for which Applicable Vesting Conditions were Satisfied During Fiscal Year | PEO [Member] |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |
Adjustment to Compensation Amount | [13] | 3,076,468 | (2,667,791) | 3,797,715 | (1,235,829)
Plus/(Minus) Change in Fair Value as of Vesting Date of Stock Option and Stock Awards Granted in Prior Years for which Applicable Vesting Conditions were Satisfied During Fiscal Year | Non-PEO NEO [Member] |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |
Adjustment to Compensation Amount | [5],[13] | 1,012,058 | (743,340) | 859,336 | (435,821)
(Minus) Fair Value as of Prior Fiscal Year-End of Stock Option and Stock Awards Granted in Prior Fiscal Years that Failed to Meet Applicable Vesting Conditions During Fiscal Year | PEO [Member] |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |
Adjustment to Compensation Amount | [14] |  |  |  |
(Minus) Fair Value as of Prior Fiscal Year-End of Stock Option and Stock Awards Granted in Prior Fiscal Years that Failed to Meet Applicable Vesting Conditions During Fiscal Year | Non-PEO NEO [Member] |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |
Adjustment to Compensation Amount | [5],[14] |  |  |  |
Measure [Axis]: 1 |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |
Measure Name |  | CDW Stock Price |  |  |
Measure [Axis]: 2 |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |
Measure Name |  | Adjusted EPS |  |  |
Measure [Axis]: 3 |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |
Measure Name |  | Adjusted FCF |  |  |
Measure [Axis]: 4 |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |
Measure Name |  | Non-GAAP Operating Income |  |  |
[1] | Amounts reported in this column represent (i) the total compensation reported in the SCT for the applicable year in the case of Ms. Leahy and (ii) the average of the total compensation reported in the SCT for the applicable year for our other NEOs reported for the applicable year other than Ms. Leahy.
[2] | Ms. Leahy has served as the Principal Executive Officer (“PEO”) for the entirety of 2023, 2022, 2021 and 2020 and our other NEOs for the applicable years were as follows:
[3] | Represents Total Compensation as reported in the SCT for the indicated fiscal year. For the other NEOs, amounts shown represent averages.
[4] | To calculate CAP, adjustments were made to the amounts reported in the SCT for the applicable year. The CAP amounts from 2020 to 2022 have been updated from the amounts reported in the 2023 proxy statement to reflect the application of the performance modifier to dividend accruals as the dividend accruals were previously reported based on a target payout. The primary difference between the calculation of SCT total compensation and CAP relates to the calculation of stock and option awards:
[5] | See footnote 1 above for the NEOs included in the average for each year.
[6] | Pursuant to rules of the SEC, the comparison assumes $100 was invested on December 31, 2019. Historic stock price performance is not necessarily indicative of future stock price performance.
[7] | The TSR Peer Group consists of S&P 500 IT Index.
[8] | The Company determined that adjusted EPS is the most important financial performance measure used to link CAP to Company performance given it impacts the vesting of 50% of the PSUs and also encompasses non-GAAP operating income performance, the primary financial measure under our SMIP. In addition, we believe that over the long-term, our earnings per share is the most significant driver of CDW’s stock price performance, which impacts the value of equity awards granted to the NEOs, the largest component of our executive compensation program. Adjusted EPS is defined as non-GAAP net income plus/minus extraordinary, non-recurring items divided by the weighted average common shares outstanding on a diluted basis. For purposes of determining adjusted EPS, non-GAAP net income is defined as net income, adjusted for the items set forth in the Company’s earnings releases which may include, among other items, amortization of intangibles, non-cash equity-based compensation and associated taxes, losses or gains from the extinguishment of debt and acquisition and integration expenses. The amount reported for each reporting year in this table represents the adjusted EPS, as calculated for the first year of the PSU performance cycle that commenced in the applicable reporting year.
[9] | Represents the grant date fair value of the stock option and stock awards granted during the indicated fiscal year, calculated in accordance with ASC718. See Note 13 to the Audited Financial Statements included in our Form 10-K for the fiscal year ended December 31, 2023 for a discussion of the relevant assumptions used in calculating these amounts.
[10] | Represents the fair value as of the indicated fiscal year-end of the outstanding and unvested option awards and stock awards granted during such fiscal year, calculated in accordance with the methodology used for financial reporting purposes, including the value associated with the accrual of any dividend equivalent rights. For awards subject to performance-based vesting conditions, the value is based on an estimate of the probable outcome of such performance-based vesting conditions as of the last day of the fiscal year, which is consistent the same methodology used to determine the grant date fair value of the awards. See Note 13 to the Audited Financial Statements included in our Form 10-K for the fiscal year ended December 31, 2023 for a discussion of the relevant assumptions used in calculating these amounts.
[11] | Represents the change in fair value during the indicated fiscal year of each option award and stock award that was granted in a prior fiscal year and that remained outstanding and unvested as of the last day of the indicated fiscal year, calculated in accordance with the methodology used for financial reporting purposes, including the value associated with the accrual of any dividend equivalent rights. For awards subject to performance-based vesting conditions, the value is based on an estimate of the probable outcome of such performance-based vesting conditions as of the last day of the fiscal year, which is consistent the same methodology used to determine the grant date fair value of the awards. See Note 13 to the Audited Financial Statements included in our Form 10-K for the fiscal year ended December 31, 2023 for a discussion of the relevant assumptions used in calculating these amounts.
[12] | Represents the fair value at vesting of the option awards and stock awards that were granted and vested during the indicated fiscal year, calculated in accordance with the methodology used for financial reporting purposes, including the value associated with the accrual of any dividend equivalent rights, and reflects the actual attainment level for the PSUs that vested on December 31st of the applicable year, as discussed in the CD&A with respect to the PSUs that vested on December 31, 2023.
[13] | Represents the change in fair value, measured from the prior fiscal year-end to the vesting date, of each option award and stock award that was granted in a prior fiscal year and which vested during the indicated fiscal year, calculated in accordance with the methodology used for financial reporting purposes, including the value associated with the accrual of any dividend equivalent rights.
[14] | Represents the fair value as of the last day of the prior fiscal year of the option award and stock awards that were granted in a prior fiscal year and which failed to meet the applicable vesting conditions in the indicated fiscal year, calculated in accordance with the methodology used for financial reporting purposes.

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