Summary of Significant Accounting Policies (Policies)	6 Months Ended
Jun. 30, 2021
Accounting Policies [Abstract]
Basis of Presentation and Principles of Consolidation	Pool Corporation (the Company, which may be referred to as we, us or our) prepared the unaudited interim Consolidated Financial Statements following U.S. generally accepted accounting principles (GAAP) and the requirements of the Securities and Exchange Commission (SEC) for interim financial information. As permitted under those rules, we have condensed or omitted certain footnotes and other financial information required for complete financial statements. The interim Consolidated Financial Statements include all normal and recurring adjustments that are necessary for a fair presentation of our financial position and operating results. All significant intercompany accounts and intercompany transactions have been eliminated.
Newly Adopted Accounting Pronouncements	On January 1, 2021, we adopted Accounting Standards Update (ASU) 2019-12, Income Taxes (Topic 740), Simplifying the Accounting for Income Taxes. This new standard simplified the accounting for income taxes by eliminating certain exceptions related to the approach for intraperiod tax allocation, the methodology for calculating income taxes in an interim period and the recognition of deferred tax liabilities for outside basis differences. Most amendments were required to be applied on a prospective basis, while certain amendments were required to be applied on a retrospective or modified retrospective basis. The adoption of this standard did not have a material impact on our consolidated financial statements or related disclosures, and we do not expect a material impact in future periods.
Income Taxes	We reduce federal and state income taxes payable by the tax benefits associated with the exercise of nonqualified stock options and the lapse of restrictions on restricted stock awards. To the extent realized tax deductions exceed the amount of previously recognized deferred tax benefits related to share-based compensation, we record an excess tax benefit. We record all excess tax benefits as a component of income tax benefit or expense on the Consolidated Statements of Income in the period in which stock options are exercised or restrictions on awards lapse.
Retained Earnings	We account for the retirement of treasury shares as a reduction of Retained earnings.

Summary of Significant Accounting Policies (Policies)

6 Months Ended

Jun. 30, 2021

Basis of Presentation and Principles of Consolidation

Pool Corporation (the Company, which may be referred to as we, us or our) prepared the unaudited interim Consolidated Financial Statements following U.S. generally accepted accounting principles (GAAP) and the requirements of the Securities and Exchange Commission (SEC) for interim financial information. As permitted under those rules, we have condensed or omitted certain footnotes and other financial information required for complete financial statements.

The interim Consolidated Financial Statements include all normal and recurring adjustments that are necessary for a fair presentation of our financial position and operating results. All significant intercompany accounts and intercompany transactions have been eliminated.

Newly Adopted Accounting Pronouncements

On January 1, 2021, we adopted Accounting Standards Update (ASU) 2019-12, Income Taxes (Topic 740), Simplifying the Accounting for Income Taxes. This new standard simplified the accounting for income taxes by eliminating certain exceptions related to the approach for intraperiod tax allocation, the methodology for calculating income taxes in an interim period and the recognition of deferred tax liabilities for outside basis differences. Most amendments were required to be applied on a prospective basis, while certain amendments were required to be applied on a retrospective or modified retrospective basis. The adoption of this standard did not have a material impact on our consolidated financial statements or related disclosures, and we do not expect a material impact in future periods.

Income Taxes

We reduce federal and state income taxes payable by the tax benefits associated with the exercise of nonqualified stock options and the lapse of restrictions on restricted stock awards. To the extent realized tax deductions exceed the amount of previously recognized deferred tax benefits related to share-based compensation, we record an excess tax benefit. We record all excess tax benefits as a component of income tax benefit or expense on the Consolidated Statements of Income in the period in which stock options are exercised or restrictions on awards lapse.

Retained Earnings

We account for the retirement of treasury shares as a reduction of Retained earnings.