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Leases and Commitments Operating Lease Assets and Liabilities (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Leases [Abstract] |  |
Operating Lease, Right-of-Use Asset | $ 540 | $ 396
Other Liabilities [Member] |  |
Leases [Abstract] |  |
Operating lease | 133 | 130
Operating Lease, Liability, Noncurrent | 423 |
Operating Lease, Liability | 556 | 404
Operating Lease, Liability | 556 | 404
Operating lease | 133 | 130
Operating Lease, Liability, Noncurrent | 423 |
Short-term Debt [Member] |  |
Leases [Abstract] |  |
Operating lease | 133 | 130
Operating lease | $ 133 | 130
Long-term Debt [Member] |  |
Leases [Abstract] |  |
Operating Lease, Liability, Noncurrent |  | 274
Operating Lease, Liability, Noncurrent |  | $ 274

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- Definition Present value of lessee's discounted obligation for lease payments from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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- Definition Amount of lessee's right to use underlying asset under operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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