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Supplemental Financial Information - Accrued Liabilities (Details) - USD ($) $ in Millions | Sep. 30, 2019 | Dec. 31, 2018
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Accrued Liabilities, Current [Abstract] |  |
Profitsharing and savings plans | $ 423 | $ 580
Vacation pay | 427 | 403
Health | 118 | 107
Workers compensation | 169 | 166
Accrual for Property and Income Taxes | 70 | 68
Other | 249 | 425
Accrued liabilities | $ 1,456 | $ 1,749

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- Definition Carrying value as of the balance sheet date of obligations incurred and payable for unused vacation time owed to employees based on the entity's vacation benefit given to its employees. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 710 -SubTopic 10 -Section 25 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6409733&loc=d3e19396-108361 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=118951113&loc=d3e6911-107765 + Details
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