v3.8.0.1

Commitments and Guarantees, Contingent Liabilities and Litigation and Regulatory Matters (Narrative Excluding Litigation) (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($)
Commitments and Guarantees and Contingent Liabilities [Line Items] |  |  |
Rental expense, net of sub-lease income | $ 258 | $ 252 | $ 232
Operating and capital leases reserve accrual | 644 |  |
Sub-lease income accrual | 0 |  |
Accrued reserves |  |  |
Commitments and Guarantees and Contingent Liabilities [Line Items] |  |  |
Operating and capital leases reserve accrual | 2 |  |
Sub-lease income accrual | $ 0 |  |
Indemnification | Securities Lending Transactions |  |  |
Commitments and Guarantees and Contingent Liabilities [Line Items] |  |  |
Guarantor Obligations, Liquidation Proceeds, Percentage | 102.00% |  |
Indemnification | Serviced Mortgages Loans |  |  |
Commitments and Guarantees and Contingent Liabilities [Line Items] |  |  |
Mortgages subject to loss-sharing arrangements | $ 12,892 | $ 11,445 |
Weighted-average debt service coverage ratio of mortgages subject to loss-sharing arrangements | 1.82 | 1.82 |
Weighted-average loan-to-value ratio of mortgages subject to loss-sharing arrangements | 59.00% | 59.00% |
Total share of losses settled | $ 0 | $ 0 | $ 1
Indemnification | Minimum | Serviced Mortgages Loans |  |  |
Commitments and Guarantees and Contingent Liabilities [Line Items] |  |  |
Share losses incurred of loan balances, Percent | 2.00% |  |
Indemnification | Maximum | Serviced Mortgages Loans |  |  |
Commitments and Guarantees and Contingent Liabilities [Line Items] |  |  |
Share losses incurred of loan balances, Percent | 20.00% |  |
Yield maintenance guarantee |  |  |
Commitments and Guarantees and Contingent Liabilities [Line Items] |  |  |
Guarantees related to certain investments the Company sold | $ 31 | $ 51 |

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- Definition Average Loan To Value Ratio Of Mortgages Subject To Loss Sharing Arrangements + References No definition available. + Details
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- Definition Loss, including interest and principal, incurred on a defaulted security, expressed as a percentage of the original principal balance, used as an input to measure fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Indicates, if estimable, (as a percentage) the approximate extent to which the proceeds from liquidation of any assets held either as collateral or by third parties would be expected to cover the maximum potential amount of future payments under the guarantee or each group of similar guarantees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=82913245&loc=d3e12069-110248 + Details
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- Definition Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=82846649&loc=d3e38371-112697 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717 + Details
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- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41499-112717 + Details
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- Definition Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions. + References No definition available. + Details
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