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Credit Facilities and Long-Term Debt (Summary of Debt Outstanding) (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021 | Jun. 26, 2020 | Oct. 11, 2016
--- | --- | --- | --- | ---
Credit Facilities and Long-Term Debt : |  |  |  |
Debt issuance costs and unamortized discount | $ (20) | $ (24) |  |
Total debt | 1,880 | 2,440 |  |
Less: short-term borrowings and current maturities of long-term debt | 0 | 0 |  |
Long-term debt, net | $ 1,880 | 2,440 |  |
2.250% Senior Notes Due 2023 |  |  |  |
Credit Facilities and Long-Term Debt : |  |  |  |
Interest rate | 2.25% |  |  |
Outstanding balances | $ 0 | 564 |  |
Debt fair value |  | 577 |  |
3.250% Senior Notes Due 2026 |  |  |  |
Credit Facilities and Long-Term Debt : |  |  |  |
Interest rate | 3.25% |  |  | 3.25%
Outstanding balances | $ 500 | 500 |  |
Debt fair value | $ 470 | 537 |  |
Senior Notes Due Twenty Twenty Eight |  |  |  |
Credit Facilities and Long-Term Debt : |  |  |  |
Interest rate | 1.95% |  | 1.95% |
Outstanding balances | $ 500 | 500 |  |
Senior Notes Due Twenty Thirty One |  |  |  |
Credit Facilities and Long-Term Debt : |  |  |  |
Interest rate | 2.25% |  | 2.25% |
Outstanding balances | $ 500 | 500 |  |
4.375% Senior Notes Due 2046 |  |  |  |
Credit Facilities and Long-Term Debt : |  |  |  |
Interest rate | 4.375% |  |  | 4.375%
Outstanding balances | $ 400 | 400 |  |
Debt fair value | 333 | 481 |  |
Level 1 | Senior Notes Due Twenty Twenty Eight |  |  |  |
Credit Facilities and Long-Term Debt : |  |  |  |
Debt fair value | 430 | 497 |  |
Level 1 | Senior Notes Due Twenty Thirty One |  |  |  |
Credit Facilities and Long-Term Debt : |  |  |  |
Debt fair value | $ 406 | $ 496 |  |

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI https://asc.fasb.org/extlink&oid=123466204&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 Reference 3: 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)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 + Details
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