COMMON EQUITY - EPS (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2025	Jun. 30, 2024
Equity [Abstract]
Net income attributed to common shareholders	$ 245.4	$ 724.2	$ 211.3	$ 622.3	$ 969.6	$ 833.6
Weighted average basic shares outstanding	320.3		315.9		319.3	315.8
Dilutive effect of stock-based compensation awards	0.6		0.3		0.5	0.3
Dilutive effect of convertible senior notes	1.3		0.0		0.9	0.0
Weighted average diluted shares	322.2		316.2		320.7	316.1
Basic EPS	$ 0.77		$ 0.67		$ 3.04	$ 2.64
Diluted EPS	$ 0.76		$ 0.67		$ 3.02	$ 2.64