Summary Of Significant Accounting Policies Summary Of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2014

Inventories [Abstract]

Schedule of inventory by costing method

	December 31, 2014			December 31, 2013
	(In millions)
LIFO inventories
FIFO value	$	1,199		$	1,408
LIFO valuation reserve	(53		)	(297		)
LIFO inventories carrying value	1,146			1,111
FIFO inventories	3,058			3,741
Market inventories	4,699			6,059
Supplies and other inventories	471			530
Total inventories	$	9,374		$	11,441