CASH AND CASH EQUIVALENTS DISCONTINUED OPERATIONS (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Significant noncash transactions
Deferred income taxes and investment tax credits, net	$ 58.3	$ 83.4
Depreciation and amortization expense	149.9	147.9
Other	(30.7)	15.2
Discontinued operations
Significant noncash transactions
Deferred income taxes and investment tax credits, net	0.0	15.5
Depreciation and amortization expense	0.0	1.6
Other	$ 1.3	$ (3.1)