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