XML 20 R10.htm IDEA: XBRL DOCUMENT

Inventory

6 Months Ended

Jun. 30, 2013

The following table summarizes the Company’s inventory balances as of June 30, 2013 and December 31, 2012:



	June 30, 2013		December 31, 2012
	(in millions)
Coal, fuel oil and other raw materials	$	363	$	373
Spare parts and supplies	400		393
Total	$	763	$	766

- Definition

The entire disclosure for inventory. This may include, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the major classes of inventory, and the nature of the cost elements included in inventory. If inventory is stated above cost, accrued net losses on firm purchase commitments for inventory and losses resulting from valuing inventory at the lower-of-cost-or-market may also be included. For LIFO inventory, may disclose the amount and basis for determining the excess of replacement or current cost over stated LIFO value and the effects of a LIFO quantities liquidation that impacts net income.

+ References+ Details