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Supplemental Cash Flow Information (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Decrease (increase) in current assets: |  |
Receivables, net | $ 145 | $ 817
Inventories | (126) | (291)
Prepaid expenses and other | (79) | 53
Increase (decrease) in current liabilities: |  |
Accounts payable | (322) | (306)
Accrued expenses | (131) | 20
Taxes other than income taxes payable | (111) | (123)
Income taxes payable | (402) | (19)
Changes in current assets and current liabilities | (1,026) | 151
Cash Flows Related to Interest and Income Taxes |  |
Interest paid in excess of amount capitalized | 127 | 128
Income taxes paid, net | $ 552 | 96
Capital Lease Obligations [Member] |  |
Supplemental Cash Flow Elements (Textual) |  |
Capital lease obligations incurred |  | 490
Assets Held under Capital Leases [Member] |  |
Supplemental Cash Flow Elements (Textual) |  |
Capital lease assets recognized |  | $ 490

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- Definition The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4297-108586 + Details
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