NEW ACCOUNTING PRONOUNCEMENTS (Details) - USD ($) $ in Millions		Mar. 31, 2026	Dec. 31, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024	Jun. 30, 2024
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' equity		$ 2,818.8	$ 2,879.2	$ 2,655.1	$ 2,382.3	$ 2,228.3	$ 2,168.2
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' equity		$ 4,266.7	4,103.3	3,862.5	$ 3,591.4	$ 3,451.4	$ 3,435.1
Cumulative effect of changes in accounting principles
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' equity	[1]		$ 0.0	18.4
Cumulative effect of changes in accounting principles | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of changes in accounting principle				24.5
Stockholders' equity	[1]			$ 18.4

[1] Reflects the adoption of accounting standard (ASU 2023-08) as described in Note 2, “New Accounting Pronouncements