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Long-Term Debt (Schedule Of Changes In Long Term Debt) (Details) - USD ($) $ in Millions | 9 Months Ended
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Sep. 30, 2019 | Sep. 30, 2018
Debt Instrument [Line Items] |  |
Balance as of beginning-of-year | $ 5,839 |
Notes issued | 495 | $ 1,094
Early extinguishment of notes | (108) | $ (537)
Reclassification of long-term debt to current maturities | (300) |
Unamortized debt issuance costs | (1) |
Unamortized adjustments from discontinued hedges | (4) |
Fair value hedge-interest rate swap | 145 |
Balance as of end-of-period | 6,070 |
3.05% Notes, Due 2030 [Member] |  |
Debt Instrument [Line Items] |  |
Notes issued | $ 500 |
Interest rate | 3.05% |
4.85% Notes, Due 2021 [Member] |  |
Debt Instrument [Line Items] |  |
Early extinguishment of notes | $ (4) |
Interest rate | 4.85% |
6.15% Notes, Due 2036 [Member] |  |
Debt Instrument [Line Items] |  |
Early extinguishment of notes | $ (105) |
Interest rate | 6.15% |

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- Definition Increase (Decrease) in Long-Term Debt, Long-term Debt Reclassified to Current + References No definition available. + Details
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- Definition Carrying amount of long-term debt, net of unamortized discount or premium, including noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans, commercial paper and the fair value of associated fair value hedges of long-term debt, if any. Excludes capital lease obligations. + References No definition available. + Details
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- Definition Unamortized adjustments from discontinued hedges + References No definition available. + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585 + Details
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