Slicers (applies to each fact value in each table cell)

Reporting Entity [Axis]

0000093751 (http://www.sec.gov/CIK)

Loans and Leases Receivable Disclosure [Abstract]	Period [Axis]
	2016-01-01 - 2016-12-31
Loans and Leases Receivable Disclosure [Abstract]
Schedule of Components of Leveraged Lease Investments	The components of our net investment in leveraged lease financing, included in the lease financing segment in the preceding table, were as follows as of December 31: (In millions) 2016   2015 Net rental income receivable $ 1,039   $ 1,159 Estimated residual values 89   89 Unearned income (286 )   (333 ) Investment in leveraged lease financing 842   915 Less: related deferred income tax liabilities (313 )   (334 ) Net investment in leveraged lease financing $ 529   $ 581
Net Loans	The following table presents our recorded investment in loans and leases, by segment, as of the dates indicated: (In millions) December 31, 2016   December 31, 2015 Domestic:       Commercial and financial:       Loans to investment funds $ 11,734   $ 11,915 Senior secured bank loans 3,256   2,929 Loans to municipalities 1,352   962 Other 70   93 Commercial real estate 27   28 Lease financing 338   337 Total domestic 16,777   16,264 Non-U.S.:       Commercial and financial:       Loans to investment funds 2,224   1,752 Senior secured bank loans 252   205 Lease financing 504   578 Total non-U.S. 2,980   2,535 Total loans and leases 19,757   18,799 Allowance for loan and lease losses (53 )   (46 ) Loans and leases, net of allowance $ 19,704   $ 18,753
Recorded Investment in Each Class of Total Loans and Leases by Credit Quality Indicator	The following tables present our recorded investment in each class of loans and leases by credit quality indicator as of the dates indicated: December 31, 2016 Commercial and Financial   Commercial Real Estate   Lease Financing   Total Loans and Leases (In millions) Investment grade(1) $ 14,889   $ 27   $ 842   $ 15,758 Speculative(2) 3,984   —   —   3,984 Substandard(4) 15   —   —   15 Total $ 18,888   $ 27   $ 842   $ 19,757 December 31, 2015 Commercial and Financial   Commercial Real Estate   Lease Financing   Total Loans and Leases (In millions) Investment grade(1) $ 14,288   $ 28   $ 888   $ 15,204 Speculative(2) 3,537   —   27   3,564 Special mention(3) 31   —   —   31 Total $ 17,856   $ 28   $ 915   $ 18,799 (1) Investment-grade loans and leases consist of counterparties with strong credit quality and low expected credit risk and probability of default. Ratings apply to counterparties with a strong capacity to support the timely repayment of any financial commitment. (2) Speculative loans and leases consist of counterparties that face ongoing uncertainties or exposure to business, financial, or economic downturns. However, these counterparties may have financial flexibility or access to financial alternatives, which allow for financial commitments to be met. (3) Special mention loans and leases consist of counterparties with potential weaknesses that, if uncorrected, may result in deterioration of repayment prospects. (4) Substandard loans and leases consist of counterparties with well-defined weakness that jeopardizes repayment with the possibility we will sustain some loss.
Schedule of Loans and Leases Receivable by Impairment Methodology	The following table presents our recorded investment in loans and leases, disaggregated based on our impairment methodology, as of the dates indicated:   December 31, 2016   December 31, 2015 (In millions) Commercial and Financial   Commercial Real Estate   Lease Financing   Total Loans and Leases   Commercial and Financial   Commercial Real Estate   Lease Financing   Total Loans and Leases Loans and leases(1):                               Individually evaluated for impairment $ 15   $ —   $ —   $ 15   $ —   $ —   $ —   $ — Collectively evaluated for impairment 18,873   27   842   19,742   17,856   28   915   18,799 Total $ 18,888   $ 27   $ 842   $ 19,757   $ 17,856   $ 28   $ 915   $ 18,799 (1) For those portfolios where there are a small number of loans each with a large balance, we review each loan annually for indicators of impairment. For those loans where no such indicators are identified, the loans are collectively evaluated for impairment. As of December 31, 2016, $195 thousand of the allowance for loan and lease loss related to commercial and financial loans individually evaluated for impairment, and the remainder of the allowance related to commercial and financial loans collectively evaluated for impairment. As of December 31, 2015, all of the allowance for loan and lease loss related to commercial and financial loans collectively evaluated for impairment.
Impaired Loans	The following table presents information related to our recorded investment in impaired loans and leases for the dates or periods indicated. As of December 31, 2015, we had no impaired loans and leases.   As of December 31, 2016   Year Ended December 31, 2016 (In millions) Recorded Investment   Unpaid Principal Balance(1)   Related Allowance(2)   Average Recorded Investment   Interest Revenue Recognized Commercial and financial(1) $ 15   $ 15   $ —   $ 15   $ — Total $ 15   $ 15   $ —   $ 15   $ — (1) As of December 31, 2016, the related allowance for loan loss was approximately $195 thousand. This relates to one loan, which was on non-accrual status. (2) As of December 31, 2016 and December 31, 2015, with exception of the aforementioned specific allowance, all of the allowance for loan and lease losses of $53 million and $46 million, respectively, related to loans that were not impaired.
Schedule of Activity in the Allowance for Loan Losses	The following table presents activity in the allowance for loan and lease losses for the periods indicated:   Years Ended December 31,   2016   2015   2014 (In millions) Total Loans and Leases   Total Loans and Leases   Total Loans and Leases Allowance for loan and lease losses(1):           Beginning balance $ 46   $ 38   $ 28 Provision for loan and lease losses 10   12   10 Charge-offs (3 )   (4 )   — Ending balance $ 53   $ 46   $ 38 (1) The provisions and charge-offs for loans and leases were attributable to exposure to senior secured loans to non-investment grade borrowers, purchased in connection with our participation in syndicated loans.