Commitments, Guarantees and Contingent Liabilities (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Minimum rental commitments under noncancelable capital and operating leases

Minimum rental commitments under operating leases with an initial or remaining term of more than one year as of December 31, 2017 are in the following table:

($ in millions)
2018	$	126
2019	113
2020	95
2021	74
2022	60
Thereafter	175
Total	$	643