STOCKHOLDERS' EQUITY AND EARNINGS PER SHARE - Share Repurchase (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025	Dec. 31, 2025
STOCKHOLDERS' EQUITY AND EARNINGS PER SHARE
Amount paid or accrued to repurchase shares			$ 0.3	$ 23.7
Number of shares repurchased	0	0		300,000
Average repurchase price per share			$ 209.36	$ 84.19
Other accrued expenses	$ 99.8		$ 99.8		$ 78.1
Remaining amount authorized by Board of Directors for future share repurchases	$ 166.6		$ 166.6

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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+ Details