Rate and Regulatory Matters (Tables)

6 Months Ended

Jun. 30, 2011

Rate and Regulatory Matters

Schedule of Regulatory Assets and Liabilities

Regulatory Assets and Liabilities	Regulatory Asset (Liability) Balance at June 30, 2011			Recovery Period Ends
Demand-side costs(a)	$	33			July 2017
Construction accounting for pollution control equipment(a)		25			July 2038
SO2 emissions allowances sales tracker(b)		8			July 2013
FERC-ordered MISO resettlements(b)		2			July 2013
2006 Storm costs(b)		1			July 2013
Vegetation management and infrastructure inspection(b)		(3	)		July 2013
Pension and postretirement benefit cost tracker for 2010 costs(a)		(11	)		July 2016
Total	$	55

(a) Recovery period first established in the MoPSC's July 2011 rate order.

(b) Previous recovery period was extended.