Inventories (Tables)

3 Months Ended

Mar. 31, 2013

Inventory Disclosure [Abstract]

Inventories

Inventories consisted of the following (in millions):

	March 31, 2013		December 31, 2012
Raw materials	$	215	$	192
Work in process	1,646		1,723
Finished goods	876		829
Total inventories	$	2,737	$	2,744