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COMMON STOCK AND TREASURY STOCK - Narrative (Detail) - USD ($) | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Mar. 31, 2021 | Dec. 31, 2020 | Sep. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Mar. 31, 2021 | Sep. 15, 2020 | May 05, 2020 | Nov. 06, 2019
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Value of total number of shares purchased |  | $ 55,058,000 | $ 97,588,000 | $ 148,400,000 | $ 119,572,000 | $ 416,219,000 |  |  |  |
2019 November Program |  |  |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Amount of Publicly Announced Program |  |  |  |  |  |  |  |  |  | $ 200,000,000
2020 May Program |  |  |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Amount of Publicly Announced Program |  |  |  |  |  |  |  |  | $ 500,000,000 |
Common Stock |  |  |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Stock repurchased and retired (in shares) |  | 309,133 | 602,003 | 1,112,606 | 995,495 | 3,635,534 | 911,136 |  |  |
Shares repurchased and retired, average cost per share (in dollars per share) |  |  |  |  |  |  | $ 167.53 |  |  |
Value of total number of shares purchased |  |  | $ 1,000 | $ 1,000 | $ 1,000 | $ 3,000 | $ 152,600,000 |  |  |
Common Stock | 2019 November Program |  |  |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Amount of Publicly Announced Program |  |  |  |  |  |  |  |  |  | $ 200,000,000
Estimated Remaining Balance Available for Share Repurchases under the Program |  |  |  |  |  |  |  | $ 0 |  |
Common Stock | 2020 May Program |  |  |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Amount of Publicly Announced Program |  |  |  |  |  |  |  |  | $ 500,000,000 |
Stock repurchased and retired (in shares) | 0 | 682,956 |  |  |  |  |  |  |  |
Shares repurchased and retired, average cost per share (in dollars per share) |  | $ 168.03 |  |  |  |  |  |  |  |
Value of total number of shares purchased |  | $ 114,800,000 |  |  |  |  |  |  |  |
Estimated Remaining Balance Available for Share Repurchases under the Program | $ 385,200,000 |  |  |  |  |  | $ 385,200,000 |  |  |

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