XML 69 R58.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Commitments, contingencies, and guarantees Commitments, Contingencies, And Guarantees (Transactions accounted for as secured borrowings) (Details) - USD ($) $ in Millions | Sep. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] |  |  |
Securities lending collateral | $ 1,757 | $ 1,092 |
Securities lending payable | 1,757 | 1,093 |
Overnight and Continuous [Member] |  |  |
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] |  |  |
Secured Borrowings, Gross, Difference, Amount | 0 | (1) | [1]
Cash and Cash Equivalents [Member] | Overnight and Continuous [Member] |  |  |
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] |  |  |
Securities lending collateral | 1,109 | 423 |
U.S. Treasury And Agency [Member] | Overnight and Continuous [Member] |  |  |
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] |  |  |
Securities lending collateral | 38 | 54 |
Foreign Government Debt [Member] | Overnight and Continuous [Member] |  |  |
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] |  |  |
Securities lending collateral | 491 | 578 |
Corporate [Member] | Overnight and Continuous [Member] |  |  |
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] |  |  |
Securities lending collateral | 0 | 37 |
Collateralized Mortgage Backed Securities [Member] | Overnight and Continuous [Member] |  |  |
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] |  |  |
Securities lending collateral | 46 | 0 |
Equity Securities [Member] | Overnight and Continuous [Member] |  |  |
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items] |  |  |
Securities lending collateral | $ 73 | $ 0 |
[1] | (1) The carrying value of the securities lending collateral held is $1 million lower than the securities lending payable at December 31, 2016 due to accrued interest recorded in the securities lending payable.

X
- Definition The fair value of collateral received by the entity associated with securities borrowed that must be returned if the counterparty fulfills its obligations. It appears on the balance sheet as a liability and has a corresponding asset that appears on the balance sheet called Securities Received as Collateral. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.15) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
Name: | us-gaap_ObligationToReturnSecuritiesReceivedAsCollateral
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of secured borrowings in excess of (less than) the liability for repurchase agreements and securities lending transactions, before offset, included in offsetting disclosures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 7 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=64858031&loc=SL34722452-111729 + Details
Name: | us-gaap_SecuredBorrowingsGrossDifferenceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The carrying amount (fair value) as of the balance sheet date of securities held that had been pledged by counterparties under financing and lending arrangements, pursuant to which the entity has the right by agreement or custom to sell or re-pledge such securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5086-111524 + Details
Name: | us-gaap_SecuritiesHeldAsCollateralAtFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_TransferOfCertainFinancialAssetsAccountedForAsSecuredBorrowingsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AssetsSoldUnderAgreementsToRepurchaseMaturityPeriodsAxis=us-gaap_MaturityOvernightMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CashAndCashEquivalentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USTreasuryAndGovernmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_ForeignGovernmentDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_MortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_EquitySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |