
(7)	Investments and Nonregulated Property, Net

Investments and nonregulated property, net consists of the following amounts as of December 31 (in millions):



	2011		2010

Nuclear decommissioning trust	$	306	$	295
Rabbi trusts	156		151
Auction rate securities	16		20
Non-utility property, net of accumulated depreciation of $9 and $8, respectively	15		15
Coal transportation property, net of accumulated depreciation of $4 and $4, respectively	8		8
Other	2		1
Total	$	503	$	490

MidAmerican Energy has established a trust for the investment of funds for decommissioning the Quad Cities Station. These investments in debt and equity securities are classified as available-for-sale and are reported at fair value. Funds are invested in the trust in accordance with applicable federal investment guidelines and are restricted for use as reimbursement for costs of decommissioning the Quad Cities Station, which are currently licensed for operation until December 2032. As of December 31, 2011 and 2010, 55% and 57%, respectively, of the fair value of the trust's funds was invested in domestic common equity securities, 10% and 11%, respectively, in domestic corporate debt securities and the remainder in investment grade municipal and United States government securities.

Rabbi trusts hold corporate-owned life insurance on certain key executives and directors. The Rabbi trusts were established to hold investments used to fund the obligations of various nonqualified executive and director compensation plans and to pay the costs of the trusts. The amount represents the cash surrender value of all of the policies included in the Rabbi trusts, net of amounts borrowed against the cash surrender value. Changes in the cash surrender value of the policies are reflected in non-operating income - other, net on the Consolidated Statements of Operation.

MidAmerican Energy has investments in interest bearing auction rate securities with a par values of $35 million and $40 million as of December 31, 2011 and 2010, respectively, and remaining maturities of 6 to 24 years. MidAmerican Energy considers the securities to be temporarily impaired, except for an other-than-temporary impairment of $3 million, after-tax, recorded in 2008, and has recorded unrealized losses on the securities of $8 million and $9 million, after tax, in AOCI as of December 13, 2011 and 2010, respectively. MidAmerican Energy does not intend to sell or expect to be required to sell the securities until the remaining principal investment is collected.

Non-utility property includes computer software, land and other assets not recoverable for regulated utility purposes. MidAmerican Energy has $9 million of currently non-recoverable utility transmission assets, which are being depreciated over 55 years. Other depreciable property consists primarily of computer software, which is amortized on a straight-line basis over five years. The coal transportation property is owned and operated by CBEC Railway Inc., a subsidiary of MidAmerican Energy. The property is depreciated on a straight-line basis over 37 years.