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Leases Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Schedule of Lease Assets and Liabilities [Line Items] |  |  |
Operating Lease, Right-of-Use Asset | [1] | $ 521 | $ 555
Current operating lease liabilities | [2] | 138 | 140
Noncurrent operating lease liabilities | [3] | 391 | 426
Total operating lease liabilities |  | 529 | 566
Finance Lease, Right-of-Use Asset, Gross |  | 15 | 15
Finance Lease, Right-Of-Use Asset, Accumulated Depreciation |  | (10) | (8)
Finance Lease, Liability, Noncurrent |  | 4 | 5
Finance Lease, Liability |  | 5 | 9
Property, Plant and Equipment [Member] |  |  |
Schedule of Lease Assets and Liabilities [Line Items] |  |  |
Finance Lease, Right-of-Use Asset |  | 5 | 7
Within One Year |  |  |
Schedule of Lease Assets and Liabilities [Line Items] |  |  |
Finance Lease, Liability, Current |  | 1 | 4
Long-term Debt [Member] |  |  |
Schedule of Lease Assets and Liabilities [Line Items] |  |  |
Finance Lease, Liability, Noncurrent |  | $ 4 | $ 5
[1] | Included in other assets in the Consolidated Balance Sheet.
[2] | Included in accrued and other current liabilities in the Consolidated Balance Sheet.
[3] | Included in other noncurrent obligations in the Consolidated Balance Sheet.

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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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