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v3.23.1

Short-Term and Long-Term Debt (Schedule Of Debt) (Details) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2022 | Oct. 31, 2022 | Dec. 31, 2022 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Current maturities of long-term debt | $ 500 |  | $ 500 |  |  |  | $ 300 |  |  |
Total short-term debt | 500 |  | 500 | $ 500 |  |  | 300 | $ 300 | $ 300 | $ 300
Total long-term debt | $ 5,955 |  | $ 5,955 | $ 5,959 | $ 6,498 | $ 6,561 | 6,325 | $ 6,323 | $ 6,334 | $ 6,294
Fixed rate, swap | 5.00% |  | 5.00% |  |  |  |  |  |  |
Debt repurchase option, Repayment as percent of principal |  |  | 100.00% |  |  |  |  |  |  |
Senior notes [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Senior Long Term Notes | $ 4,368 |  | $ 4,368 |  |  |  | 4,568 |  |  |
Subordinated Debt [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Term loans | 995 |  | 995 |  |  |  | 995 |  |  |
Capital Securities [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Capital securities | 218 |  | 218 |  |  |  | 218 |  |  |
Long-term Debt [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Unamortized premiums (discounts) | (6) |  | (6) |  |  |  | (6) |  |  |
Unamortized debt issuance costs | (34) |  | (34) |  |  |  | (35) |  |  |
Unamortized adjustments from discontinued hedges | 341 |  | 341 |  |  |  | 356 |  |  |
Fair value hedge on interest rate swap agreements | (177) |  | (177) |  |  |  | (21) |  |  |
Total long-term debt | $ 5,955 |  | $ 5,955 |  |  |  | 6,325 |  |  |
4.00% notes, due 2023 [Member] | Senior notes [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Senior Long Term Notes |  |  |  |  |  |  | 500 |  |  |
Interest rate | 4.00% |  | 4.00% |  |  |  |  |  |  |
3.35% notes, due 2025 [Member] | Senior notes [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Senior Long Term Notes | $ 300 |  | $ 300 |  |  |  | 300 |  |  |
Interest rate | 3.35% |  | 3.35% |  |  |  |  |  |  |
3.625% notes, due 2026 [Member] | Senior notes [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Senior Long Term Notes | $ 400 |  | $ 400 |  |  |  | 400 |  |  |
Interest rate | 3.625% |  | 3.625% |  |  |  |  |  |  |
3.80% notes, due 2028 [Member] | Senior notes [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Senior Long Term Notes | $ 500 |  | $ 500 |  |  |  | 500 |  |  |
Interest rate | 3.80% |  | 3.80% |  |  |  |  |  |  |
3.05% notes, due 2030 [Member] | Senior notes [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Senior Long Term Notes | $ 500 |  | $ 500 |  |  |  | 500 |  |  |
Interest rate | 3.05% |  | 3.05% |  |  |  |  |  |  |
3.40% notes, due 2031 [Member] | Senior notes [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Senior Long Term Notes | $ 500 |  | $ 500 |  |  |  | 500 |  |  |
Interest rate | 3.40% |  | 3.40% |  |  |  |  |  |  |
3.40% notes, due 2032 [Member] | Senior notes [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Senior Long Term Notes | $ 300 |  | $ 300 |  |  |  |  |  |  |
Interest rate | 3.40% |  | 3.40% |  |  |  |  |  |  |
6.15% notes, due 2036 [Member] | Senior notes [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Senior Long Term Notes | $ 243 |  | $ 243 |  |  |  | 243 |  |  |
Interest rate | 6.15% |  | 6.15% |  |  |  |  |  |  |
6.30% notes, due 2037 [Member] | Senior notes [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Senior Long Term Notes | $ 375 |  | $ 375 |  |  |  | 375 |  |  |
Interest rate | 6.30% |  | 6.30% |  |  |  |  |  |  |
7.00% notes, due 2040 [Member] | Senior notes [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Senior Long Term Notes | $ 500 |  | $ 500 |  |  |  | 500 |  |  |
Interest rate | 7.00% |  | 7.00% |  |  |  |  |  |  |
4.35% notes, due 2048 [Member] | Senior notes [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Senior Long Term Notes | $ 450 |  | $ 450 |  |  |  | 450 |  |  |
Interest rate | 4.35% |  | 4.35% |  |  |  |  |  |  |
4.375% notes, due 2050 [Member] | Senior notes [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Senior Long Term Notes | $ 300 |  | $ 300 |  |  |  | 300 |  |  |
Interest rate | 4.375% |  | 4.375% |  |  |  |  |  |  |
LIBOR + 87.5 bps loan, due 2024 [Member] | Term Loans [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Term loans | $ 250 |  | $ 250 |  |  |  | 250 |  |  |
Variable rate | 112.50% | 87.50% | 20.24% |  |  |  |  |  |  |
LIBOR +236 bps, due 2066 [Member] | Subordinated Debt [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Term loans | $ 562 |  | $ 562 |  |  |  | 562 |  |  |
Variable rate |  |  | 2.36% |  |  |  |  |  |  |
LIBOR +236 bps, due 2066 [Member] | Capital Securities [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Capital securities | 160 |  | $ 160 |  |  |  | 160 |  |  |
Variable rate |  |  | 2.36% |  |  |  |  |  |  |
LIBOR +204 bps, due 2067 [Member] | Subordinated Debt [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Term loans | 433 |  | $ 433 |  |  |  | 433 |  |  |
Variable rate |  |  | 2.04% |  |  |  |  |  |  |
LIBOR +204 bps, due 2067 [Member] | Capital Securities [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Capital securities | $ 58 |  | $ 58 |  |  |  | $ 58 |  |  |
Variable rate |  |  | 2.04% |  |  |  |  |  |  |

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