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Derivatives and Hedging Activities (Details Textuals) - USD ($) shares in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Mar. 31, 2016 | Mar. 31, 2015 | Jun. 30, 2014 | Dec. 31, 2015
Derivatives and Hedging Activities (Textuals) [Abstract] |  |  |  |
Net reduction in interest expense on long term debt and other | $ 59,000,000 | $ 70,000,000 |  |
Derivative asset not offset |  |  |  | $ 0
Shares held in equity investment sold | 0.0 |  |  |
Margin On Interest Rate Swap Not Netted | $ 140,000,000 |  |  | 149,000,000
Derivative [Line Items] |  |  |  |
Equity investment | 1,000,000 |  |  | 1,000,000
Net hedge ineffectiveness | 0 | 0 |  |
Derivative Instruments, Gain (Loss) Recognized in Income, Net |  | 293,000,000 |  |
Not Sold Or Repledged [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Securities received as collateral | 0 |  |  | 43,000,000
Other Expense [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Gain (Loss) in Changes of Fair Value of Derivatives not designated as hedges | (13,000,000) | 97,000,000 |  |
Gain on embedded derivatives | 6,000,000 | 0 |  |
ICBC [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Equity investment | 0 |  |  |
Fair Value Hedges [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Notional amount of long-term debt | 18,800,000,000 |  |  | 18,800,000,000
Net Investment Hedging [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Effective portion of gain (loss) on hedges | (92,000,000) | 195,000,000 | $ 0 |
Net Investment Hedging [Member] | Other Expense [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Amount reclassified from AOCI into income | 0 | 0 |  |
Net hedge ineffectiveness | 0 | 0 |  |
Net Investment Hedging [Member] | Net Investment Hedging [Member] | Other Expense [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Amount reclassified from AOCI into income | 0 | $ 0 |  |
Credit Valuation Adjustment [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Notional amount of long-term debt | $ (13,000,000) |  |  | $ 0

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- Definition Fair value of derivative assets that are permitted under a master netting arrangement, but elected not to be presented as an offset against an obligation to return collateral received against such assets. + References No definition available. + Details
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- Definition Effective portion of cumulative gains and losses on foreign currency derivatives that are designated as, and are effective as, hedges of a net investment in a foreign entity commencing as of the designation date. Adjustment reported in equity as part of accumulated other comprehensive income. + References No definition available. + Details
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- Definition Represents the amount of a net reduction to interest expense on long-term debt and other, primarily related to the net settlements on the Company's fair value hedges. + References No definition available. + Details
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- Definition Amount of equity securities categorized neither as held-to-maturity nor as trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=51813488&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49167202&loc=d3e26610-111562 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803 + Details
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- Definition The portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments representing (a) the amount of the hedge ineffectiveness and (b) the amount, if any, excluded from the assessment of hedge effectiveness. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -Subparagraph (a)(1),(2) -URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986 + Details
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