ADVERTISING COSTS (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Capitalized direct-response advertising costs and advertising expense
Capitalized direct-response advertising costs, net of accumulated amortization	$ 4.9		$ 4.9		$ 5.2
Amortization period of direct-response advertising costs			2 years
Amortization of direct-response advertising costs	0.1	0.1	1.8	4.1
Other advertising expense	2.3	2.2	6.1	6.6
IES's retail energy business
Capitalized direct-response advertising costs and advertising expense
Other advertising expense	1.0	1.0	3.3	4.0
Other
Capitalized direct-response advertising costs and advertising expense
Other advertising expense	$ 1.3	$ 1.2	$ 2.8	$ 2.6