Short-Term Borrowings

12 Months Ended

Dec. 31, 2011

Short-term Debt [Abstract]

Short-term Borrowings

16.    Short-term Borrowings

The following table presents the composition of our short-term borrowings portfolio.

	2011							2010
December 31, ($ in millions)	Unsecured		Secured		Total			Unsecured		Secured		Total
Demand notes	$	2,756	$	—	$	2,756		$	2,033	$	—	$	2,033
Bank loans and overdrafts	1,613		—		1,613			1,970		—		1,970
Federal Home Loan Bank	—		1,400		1,400			—		1,300		1,300
Other (a)	146		1,765		1,911			224		1,981		2,205
Total short-term borrowings	$	4,515	$	3,165	$	7,680		$	4,227	$	3,281	$	7,508
Weighted average interest rate (b)					3.6		%					3.5		%

(a) Other primarily includes nonbank secured borrowings at our Mortgage and International Automotive Finance operations.

(b) Based on the debt outstanding and the interest rate at December 31 of each year.