RATE AND OTHER REGULATORY MATTERS (Tables)

6 Months Ended

Jun. 30, 2011

RATE AND OTHER REGULATORY MATTERS

Summary of regulatory assets

	June 30,		December 31,
Millions of dollars	2011		2010
Regulatory Assets:
Accumulated deferred income taxes	$	210	$	210
Under-collections - electric fuel adjustment clause	59		25
Environmental remediation costs	31		32
AROs and related funding	310		298
Franchise agreements	42		45
Deferred employee benefit plan costs	321		326
Planned major maintenance	19		6
Deferred losses on interest rate derivatives	90		83
Other	46		36
Total Regulatory Assets	$	1,128	$	1,061

Summary of regulatory liabilities

Regulatory Liabilities:
Accumulated deferred income taxes	$	25	$	26
Asset removal costs	804		780
Storm damage reserve	36		38
Monetization of bankruptcy claim	36		37
Deferred gains on interest rate derivatives	25		26
Other	5		6
Total Regulatory Liabilities	$	931	$	913