Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2010

Marketable Securities

Schedule of Marketable Securities

	Dec. 31,		Dec. 31,
(Millions)	2010		2009
U.S. government agency securities	$	246	$	326
Foreign government agency securities	52		—
Corporate debt securities	280		154
Commercial paper	55		—
U.S. treasury securities	55		—
U.S. municipal securities	20		—
Asset-backed securities:
Automobile loan related	253		198
Credit card related	79		9
Equipment lease related	24		41
Other	8		8
Asset-backed securities total	364		256
Other securities	29		8
Current marketable securities	$	1,101	$	744
U.S. government agency securities	$	63	$	165
Foreign government agency securities	3		—
Corporate debt securities	192		112
U.S. treasury securities	44		94
U.S. municipal securities.	3		—
Asset-backed securities:
Automobile loan related	144		317
Credit card related	70		98
Equipment lease related	14		29
Other	—		5
Asset-backed securities total	228		449
Auction rate securities	7		5
Non-current marketable securities	$	540	$	825
Total marketable securities	$	1,641	$	1,569

Marketable securities by contractual maturity

	Dec. 31,
(Millions)	2010
Due in one year or less	$	794
Due after one year through three years	796
Due after three years through five years	17
Due after five years	34
Total marketable securities	$	1,641