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Debt and Credit Agreements - Schedule of Long-term Debt Maturities (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
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Maturities of Long-term Debt [Abstract] |  |
2021 | $ 401 |
2022 | 162 |
2023 | 139 |
2024 | 551 |
2025 | 601 |
Thereafter | 14,851 |
Subtotal Long-term Debt (including current portion) | $ 16,705 | $ 16,238

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- Definition Amount of short-term and long-term debt and lease obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13,16) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 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 http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
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