COMMITMENTS AND CONTINGENCIES Commitments and Contingencies (Tables)

6 Months Ended

Jun. 30, 2013

Commitments and Contingencies Disclosure [Abstract]

Schedule of minimum future commitments related to the purchase obligations

We routinely enter into long-term purchase and sale commitments for various quantities and lengths of time. We have obligations to distribute and sell electricity and natural gas to our customers and expect to recover costs related to these obligations in future customer rates. The following table shows our minimum future commitments related to these purchase obligations as of June 30, 2013.

				Payments Due By Period
(Millions)	Date Contracts Extend Through	Total Amounts Committed		2013		2014		2015		2016		2017		Later Years
Electric utility
Purchased power	2029	$	796.6	$	75.8	$	34.8	$	31.3	$	28.1	$	27.0	$	599.6
Coal supply and transportation	2017	116.5		29.4		44.2		31.5		7.2		4.2		—
Natural gas utility supply and transportation	2024	279.8		22.5		45.8		42.5		38.7		37.6		92.7
Total		$	1,192.9	$	127.7	$	124.8	$	105.3	$	74.0	$	68.8	$	692.3