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Derivatives and Risk Management Activities (Details 2) (USD $) In Millions, unless otherwise specified |  |  |  | 1 Months Ended |
--- | --- | --- | --- | --- | ---
Mar. 31, 2014 | Mar. 31, 2014 10 forward starting interest rate swaps (30-year) Cash flow hedge contract | Apr. 30, 2014 Treasury locks entered into in anticipation of issuance of 4.70% senior notes due 2044 Subsequent Event | Mar. 31, 2014 Treasury locks entered into in anticipation of issuance of 4.70% senior notes due 2044 Cash flow hedge contract | Apr. 30, 2014 Treasury locks entered into in anticipation of issuance of 4.70% senior notes due 2044 Cash flow hedge Subsequent Event | Apr. 30, 2014 Treasury locks entered into April 2014 Cash flow hedge Subsequent Event
Interest Rate Risk Hedging |  |  |  |  |  |
Net deferred gains (losses) from interest rate risk hedging included in AOCI | $ (83) |  |  |  |  |
Number of outstanding interest rate swaps (in contracts) |  | 10 |  | 4 |  |
Rate of fixed interest to be received on interest rate swap (as a percent) |  | 3.60% |  | 3.64% |  |
Notional amount of derivatives |  | 250 | 250 | 200 |  | 50
Cash payment for (proceeds from) termination of interest rate swaps |  |  |  |  | $ 7 |

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Amount of gain or loss related to open and terminated interest rate derivatives that were designated for hedge accounting. + References No definition available. + Details
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- Definition Average fixed interest rate related to the group of interest rate derivatives. + References No definition available. + Details
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- Details
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- Definition Number of interest rate derivative instruments held by the entity at the reporting date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5579245-113959 + Details
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- Definition The net cash outflow or inflow for a financial contract that meets the hedge criteria as either cash flow hedge, fair value hedge or hedge of net investment in foreign operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3095-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3098-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 27 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3581-108585 + Details
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