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Debt (Schedule Of Changes In Debt) (Details) $ in Millions | 6 Months Ended
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Jun. 30, 2020 USD ($)
Debt Instrument [Line Items] |
Balance as of beginning-of-year | $ 6,367
Notes issued | 1,289
Repayment of notes | (1,096)
Unamortized premiums (discounts) | (1)
Unamortized debt issuance costs | (6)
Unamortized adjustments from discontinued hedges | 259
Fair value hedge on interest rate swap agreements | (87)
Balance as of end-of-period | 6,736
3.40% notes Due 2031 [Member] |
Debt Instrument [Line Items] |
Notes issued | $ 500
Interest rate | 3.40%
4.375% Notes Due 2050 [Member] |
Debt Instrument [Line Items] |
Notes issued | $ 300
Interest rate | 4.375%
6.25% Senior Notes, Due 2020 [Member] |
Debt Instrument [Line Items] |
Repayment of notes | $ (300)
Interest rate | 6.25%
4.85% Notes, Due 2021 [Member] |
Debt Instrument [Line Items] |
Repayment of notes | $ (296)
Interest rate | 4.85%
LIBOR + 150 bps Term Loan Issued, Due 2022 [Member] |
Debt Instrument [Line Items] |
Notes issued | $ 500
Repayment of notes | $ (500)
LIBOR + 150 bps Term Loan Issued, Due 2022 [Member] | London Interbank Offered Rate (LIBOR) [Member] |
Debt Instrument [Line Items] |
Variable rate | 1.50%

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