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Debt and Credit Agreements - Activity Related to Long-Term Debt (Details) - USD ($) $ in Millions | 9 Months Ended
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Sep. 30, 2022 | Sep. 30, 2021
Movement, Debt Instruments [Roll Forward] |  |
Long-term Debt as of December 31, 2021, Current Portion | $ 181 |
Long-term Debt as of December 31, 2021, Long-term Portion | 16,185 |
Long-term Debt as of December 31, 2021, Total | 16,366 |
Long-term Debt Issued | 2,000 | $ 0
Long-term Debt Repaid | (178) | $ (390)
Reclassifications | 0 |
Hedging, Discount, Premium and Other Activity | (138) |
Long-term Debt as of June 30, 2022, Current Portion | 155 |
Long-term Debt as of June 30, 2022, Long-term Portion | 17,895 |
Long-term Debt as of June 30, 2022, Total | 18,050 |
Current Portion |  |
Movement, Debt Instruments [Roll Forward] |  |
Long-term Debt as of December 31, 2021, Current Portion | 181 |
Long-term Debt Issued | 0 |
Long-term Debt Repaid | (178) |
Reclassifications | 150 |
Hedging, Discount, Premium and Other Activity | 2 |
Long-term Debt as of June 30, 2022, Current Portion | 155 |
Long-term Portion |  |
Movement, Debt Instruments [Roll Forward] |  |
Long-term Debt as of December 31, 2021, Long-term Portion | 16,185 |
Long-term Debt Issued | 2,000 |
Long-term Debt Repaid | 0 |
Reclassifications | (150) |
Hedging, Discount, Premium and Other Activity | (140) |
Long-term Debt as of June 30, 2022, Long-term Portion | $ 17,895 |

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- Definition Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI https://asc.fasb.org/extlink&oid=124435984&loc=d3e28541-108399 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1F -Subparagraph (b)(2) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495355-112611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227 + Details
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