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Leases Lessee (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2019 | Dec. 31, 2018
Lessee, Lease, Description [Line Items] |  |
Operating Lease, Residual Value of Leased Asset | $ 292 |
Operating lease right-of-use assets | 2,506 | $ 0
Operating Lease, Liability, Current | 474 |
Long-term operating lease liabilities | 2,046 | 0
Operating Leases, Future Minimum Payments Due, Next Twelve Months |  | 835
Operating Leases, Future Minimum Payments, Due in Two Years |  | 476
Operating Leases, Future Minimum Payments, Due in Three Years |  | 345
Operating Leases, Future Minimum Payments, Due in Four Years |  | 253
Operating Leases, Future Minimum Payments, Due in Five Years |  | 162
Operating Leases, Future Minimum Payments, Due Thereafter |  | 590
Operating Leases, Future Minimum Payments Due |  | $ 2,661
Property leases [Member] |  |
Lessee, Lease, Description [Line Items] |  |
Operating Lease, Cost | 177 |
Variable Lease, Cost | 51 |
Lease, Cost | 228 |
Operating lease right-of-use assets | 2,506 |
Long-term operating lease liabilities | 2,046 |
Operating Lease, Liability | $ 2,520 |
Operating Lease, Weighted Average Remaining Lease Term | 9 years 6 months |
Operating Lease, Weighted Average Discount Rate, Percent | 4.58% |
Operating Lease, Payments | $ 189 |
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability | (113) |
Lessee, Operating Lease, Liability, Payments, Due Next Rolling Twelve Months | 615 |
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Two | 404 |
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Three | 359 |
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Four | 304 |
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Five | 252 |
Lessee, Operating Lease, Liability, Payments, Due after Rolling Year Five | 1,220 |
Lessee, Operating Lease, Liability, Payments, Due | 3,154 |
Lessee, Operating Lease, Liability, Undiscounted Excess Amount | (634) |
Vehicle leases [Member] |  |
Lessee, Lease, Description [Line Items] |  |
Lease, Cost | 69 |
Finance Lease, Right-of-Use Asset, Amortization | 11 |
Finance Lease, Interest Expense | 1 |
Operating lease right-of-use assets | 147 |
Operating Lease, Liability, Current | 82 |
Long-term operating lease liabilities | 65 |
Operating Lease, Liability | $ 147 |
Operating Lease, Weighted Average Remaining Lease Term | 2 years 10 months |
Operating Lease, Weighted Average Discount Rate, Percent | 3.09% |
Finance Lease, Right-of-Use Asset, Gross | $ 282 |
Finance Lease, Right-of-Use Asset, Accumulated Amortization | (50) |
Finance Lease, Right-of-Use Asset | 232 |
Finance Lease, Liability, Current | 82 |
Finance Lease, Liability, Noncurrent | 117 |
Finance Lease, Liability | $ 199 |
Finance Lease, Weighted Average Remaining Lease Term | 1 year 10 months |
Finance Lease, Weighted Average Discount Rate, Percent | 1.40% |
Operating Lease, Payments | $ 27 |
Finance Lease, Interest Payment on Liability | 1 |
Finance Lease, Principal Payments | 38 |
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability | (8) |
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability | 35 |
Lessee, Operating Lease, Liability, Payments, Due Next Rolling Twelve Months | 87 |
Finance Lease, Liability, Payments, Due in Next Rolling Twelve Months | 82 |
Finance Lease, Liability, Payments, Due in Rolling Year Two | 12 |
Finance Lease, Liability, Payments, Due in Rolling Year Three | 100 |
Finance Lease, Liability, Payments, Due in Rolling Year Four | 5 |
Finance Lease, Liability, Payments, Due in Rolling Year Five | 0 |
Finance Lease, Liability, Payments, Due in Rolling after Year Five | 0 |
Finance Lease, Liability, Payments, Due | 199 |
Finance Lease, Liability, Undiscounted Excess Amount | 0 |
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Two | 43 |
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Three | 16 |
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Four | 6 |
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Five | 0 |
Lessee, Operating Lease, Liability, Payments, Due after Rolling Year Five | 0 |
Lessee, Operating Lease, Liability, Payments, Due | 152 |
Lessee, Operating Lease, Liability, Undiscounted Excess Amount | (5) |
Property, Plant and Equipment, Other Types [Member] |  |
Lessee, Lease, Description [Line Items] |  |
Finance Lease, Right-of-Use Asset, Gross | 25 |
Finance Lease, Right-of-Use Asset, Accumulated Amortization | (2) |
Finance Lease, Right-of-Use Asset | 23 |
Finance Lease, Liability, Current | 8 |
Finance Lease, Liability, Noncurrent | 15 |
Finance Lease, Liability | $ 23 |
Finance Lease, Weighted Average Remaining Lease Term | 4 years |
Finance Lease, Weighted Average Discount Rate, Percent | 5.86% |
Finance Lease, Liability, Payments, Due in Next Rolling Twelve Months | $ 9 |
Finance Lease, Liability, Payments, Due in Rolling Year Two | 6 |
Finance Lease, Liability, Payments, Due in Rolling Year Three | 3 |
Finance Lease, Liability, Payments, Due in Rolling Year Four | 3 |
Finance Lease, Liability, Payments, Due in Rolling Year Five | 2 |
Finance Lease, Liability, Payments, Due in Rolling after Year Five | 3 |
Finance Lease, Liability, Payments, Due | 26 |
Finance Lease, Liability, Undiscounted Excess Amount | $ (3) |

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- Definition Amount of interest expense on finance lease liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918638-209977 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971 + Details
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- Definition Amount of lessee's undiscounted obligation for lease payments for finance lease, due after fifth fiscal year following latest statement of financial position date. For interim and annual periods when interim periods are reported on rolling approach, from latest statement of financial position date. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -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 + Details
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- Definition Amount of lessee's undiscounted obligation for lease payments for finance lease, due after fifth rolling twelve months following latest statement of financial position date. For interim and annual periods when interim periods are reported on rolling approach, from latest statement of financial position date. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -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 + Details
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- Definition Amount of lessee's undiscounted obligation for lease payments for finance lease, due in fifth rolling twelve months following latest statement of financial position date. For interim and annual periods when interim periods are reported on rolling approach, from latest statement of financial position date. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -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 + Details
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- Definition Amount of lessee's undiscounted obligation for lease payments for finance lease, due in fourth rolling twelve months following latest statement of financial position date. For interim and annual periods when interim periods are reported on rolling approach, from latest statement of financial position date. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -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 + Details
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- Definition Amount of lessee's undiscounted obligation for lease payments for finance lease, due in third rolling twelve months following latest statement of financial position date. For interim and annual periods when interim periods are reported on rolling approach, from latest statement of financial position date. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -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 + Details
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- Definition Amount of lessee's undiscounted obligation for lease payments for finance lease, due in second rolling twelve months following latest statement of financial position date. For interim and annual periods when interim periods are reported on rolling approach, from latest statement of financial position date. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -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 + Details
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- Definition Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for 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 + Details
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- Definition Amount of cash outflow for principal payment on finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918643-209977 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(1) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 + Details
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- Definition Amount of lessee's right to use underlying asset under finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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- Definition Amount of amortization expense attributable to right-of-use asset 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 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918638-209977 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971 + Details
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- Definition Weighted average discount rate for finance lease calculated at point in time. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(4) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971 + Details
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- Definition Weighted average remaining lease term for finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(3) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971 + Details
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- Definition Amount of lessee's undiscounted obligation for lease payments for operating 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 + Details
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- Definition Amount of lessee's undiscounted obligation for lease payments for operating lease, due after fifth rolling twelve months following latest statement of financial position date. For interim and annual periods when interim periods are reported on rolling approach, from latest statement of financial position date. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -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 + Details
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- Definition Amount of lessee's undiscounted obligation for lease payments for operating lease, due in next rolling twelve months following latest statement of financial position date. For interim and annual periods when interim periods are reported on a rolling approach, from latest statement of financial position date. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -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 + Details
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- Definition Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for operating 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 + Details
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