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Derivatives and Hedging Activities (Details Textuals) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017 | Dec. 31, 2017
Derivatives and Hedging Activities (Textuals) [Abstract] |  |  |  |  |
Net reduction in interest expense on long term debt and other | $ (20) | $ 24 | $ (19) | $ 105 |
Margin On Interest Rate Swap Not Netted | 99 |  | 99 |  | $ 146
Derivative [Line Items] |  |  |  |  |
Notional amount of long-term debt | 24,200 |  | 24,200 |  | 23,600
Cummulative fair value hedging adjustment of hedged item in fair value hedge | 513 |  | 513 |  | 182
Other Expense [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Gain (Loss) in Changes of Fair Value of Derivatives not designated as hedges | (8) | (15) | 26 | (36) |
Gain on embedded derivatives | (5) | 1 | (11) | (1) |
Fair Value Hedges [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Notional amount of long-term debt | 24,800 |  | 24,800 |  | $ 23,800
Net Investment Hedges [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Effective portion of gain (loss) on hedges | (22) | (184) | 136 | (515) |
Net Investment Hedges [Member] | Other Expense [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Amount reclassified from AOCI into income | 0 | (18) | 1 | (18) |
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net | $ 0 | $ (18) | $ 1 | $ (18) |

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- Definition Changes in the fair value of the derivatives and the related underlying foreign currency exposure + References No definition available. + Details
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- Definition Cummulative FV hedging adjustments + References No definition available. + Details
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- Definition Derivatives and Hedging Activities. + References No definition available. + Details
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- Definition Amount posted as initial margin for centrally cleared interest rate swaps which is not netted against the derivative balances. + 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 the hedged item as of the balance sheet date related to the derivative. For example, the hedged balance on a debt instrument. + References No definition available. + Details
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- Definition The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments. + 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 (c) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4D -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624177-113959 + Details
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- Definition Increase in the fair value of the embedded derivative or group of embedded derivatives included in earnings in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 + Details
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- Definition Amount of increase (decrease) in the cumulative translation adjustment from gain (loss), after tax, on foreign currency derivatives, that are designated as, and are effective as, economic hedges of a net investment in a foreign entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -Subparagraph (b),(c),(d) -URI http://asc.fasb.org/extlink&oid=64808268&loc=d3e32211-110900 + Details
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