Commitments, Guarantees and Contingent Liabilities (Tables)

12 Months Ended

Dec. 31, 2012

Commitments, Guarantees and Contingent Liabilities

Minimum rental commitments under noncancelable capital and operating leases

($ in millions)	Capital leases		Operating leases
2013	$	19	$	166
2014		17		130
2015		7		99
2016		7		72
2017		2		43
Thereafter		11		70
Total	$	63	$	580
Present value of minimum capital lease payments	$	55