Guarantees (Tables)

3 Months Ended

Mar. 31, 2018

Guarantees [Abstract]

Repurchased Mortgage Loan [Table Text Block]

The following table summarizes the carrying value of the Company's outstanding repurchased residential mortgage loans:

(Dollars in millions)	March 31, 2018		December 31, 2017
Outstanding repurchased residential mortgage loans:
Performing LHFI		$197		$203
Nonperforming LHFI	18		16
Total carrying value of outstanding repurchased residential mortgages		$215		$219