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Leases Schedule of Lease Assets and Liabilities (Details) - USD ($) $ in Millions | Sep. 30, 2019 | Dec. 31, 2018 | Sep. 30, 2018
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Schedule of Lease Assets and Liabilities [Line Items] |  |  |  |
Operating Lease, Right-of-Use Asset | [1] | $ 543 |  |
Operating Lease, Liability, Current | [2] | 149 |  |
Operating Lease, Liability, Noncurrent | [3] | 407 |  |
Operating Lease, Liability |  | 556 |  |
Finance Lease, Right-of-Use Asset, Gross |  | 15 |  |
Finance Lease, Right-Of-Use Asset, Accumulated Depreciation |  | (7) |  |
Finance Lease, Liability, Current |  | 4 | $ 25 | $ 6
Finance Lease, Liability |  | 10 |  |
Property, Plant and Equipment [Member] |  |  |  |
Schedule of Lease Assets and Liabilities [Line Items] |  |  |  |
Finance Lease, Right-of-Use Asset |  | 8 |  |
Short-term Debt [Member] |  |  |  |
Schedule of Lease Assets and Liabilities [Line Items] |  |  |  |
Finance Lease, Liability, Current |  | 4 |  |
Long-term Debt [Member] |  |  |  |
Schedule of Lease Assets and Liabilities [Line Items] |  |  |  |
Finance Lease, Liability, Noncurrent |  | $ 6 |  |
[1] | Included in other assets in the interim Condensed Consolidated Balance Sheet.
[2] | Included in accrued and other current liabilities in the interim Condensed Consolidated Balance Sheet.
[3] | Included in other noncurrent obligations in the interim Condensed Consolidated Balance Sheet.

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- Definition Amount before accumulated depreciation of lessee's right to use underlying asset under finance lease + References No definition available. + Details
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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=77888426&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=77888419&loc=SL77918627-209977 + Details
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