Loans and Leases (Financing Receivables on Non-Accrual Status) (Details) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Loans and Leases Receivable, Impaired, Nonperforming, Non-accrual of Interest	$ 87	$ 158
Property Development [Member]
Loans and Leases Receivable, Impaired, Nonperforming, Non-accrual of Interest	74	79
Property Development Acquired-Credit-Impaired [Member]
Loans and Leases Receivable, Impaired, Nonperforming, Non-accrual of Interest		42
Other - Acquired-Credit-Impaired [Member]
Loans and Leases Receivable, Impaired, Nonperforming, Non-accrual of Interest	13	22
Other [Member]
Loans and Leases Receivable, Impaired, Nonperforming, Non-accrual of Interest		$ 15