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Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Operating Leases |  |
Operating Lease ROU Assets | $ 851 | $ 855
Operating Lease Liabilities due Within One Year | 198 | 199
Operating Lease Liabilities | 684 | 668
Total Operating Lease Liabilities | 882 | 867
Finance Leases |  |
Property, Plant and Equipment, at cost | 262 | 259
Accumulated Depreciation | (60) | (50)
Property, Plant and Equipment, net | 202 | 209
Long Term Debt and Finance Leases due Within One Year | 18 | 6
Long Term Debt and Finance Leases | 232 | 243
Total Finance Lease Liabilities | $ 250 | $ 249
Weighted Average Remaining Lease Term |  |
Operating Leases | 7 years 3 months 18 days | 7 years 2 months 12 days
Finance Leases | 30 years 10 months 24 days | 31 years 7 months 6 days
Weighted Average Discount Rate |  |
Operating Leases | 6.85% | 6.69%
Finance Leases | 8.48% | 8.46%

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- Definition Present value of lessee's discounted obligation for lease payments from finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980 Reference 2: 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=121603541&loc=SL77918627-209977 + Details
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