Contingencies and Other Risks (Details) - USD ($) $ in Millions	12 Months Ended	48 Months Ended
Dec. 31, 2016	Dec. 31, 2016
Loss Contingency [Abstract]
Consent Order Fees and Expenses		$ 240
Litigation Settlement, Amount	$ 52

Amount of litigation expense, including but not limited to legal, forensic, accounting, and investigative fees.

No definition available.

Name:	us-gaap_LitigationSettlementExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration