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Leases (Tables) | 12 Months Ended
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Dec. 31, 2019
Leases [Abstract] |
Schedule of Leasing Activity | The components of lease costs for the year ended December 31, 2019 were as follows:
| December 31,
Dollars in millions | 2019
Operating lease cost | $ | 54 |
Short-term lease cost | 121 |
Total lease cost | $ | 175 |
Operating lease cost for the year ended ended December 31, 2019 includes operating lease ROU asset amortization of $38 million and other noncash operating lease costs of $16 million related to the accretion of operating lease liabilities and straight-line lease accounting. Total rent expense on our operating leases under the previous lease standard were $144 million and $139 million for the years ended December 31, 2018 and 2017, respectively. Total short-term lease commitments as of December 31, 2019 was approximately $77 million. Additional information related to leases was as follows:
| December 31,
Dollars in millions | 2019
Cash paid for amounts included in the measurement of lease liabilities |
Operating cash flows from operating leases | $ | 56 |
Right-of-use assets obtained in exchange for new operating lease liabilities | $ | 20 |
Weighted-average remaining lease term-operating (in years) | 8.0 |
Weighted-average discount rate-operating leases | 7.6 | %
Schedule of Lease Maturity | The following is a maturity analysis of the future undiscounted cash flows associated with our operating lease liabilities as of December 31, 2019:
| Year
Dollars in millions | 2020 |  | 2021 |  | 2022 |  | 2023 |  | 2024 |  | Thereafter |  | Total
Future payments - operating leases | $ | 54 |  |  | $ | 44 |  |  | $ | 37 |  |  | $ | 33 |  |  | $ | 25 |  |  | $ | 119 |  |  | $ | 312 |
Dollars in millions | Operating Leases
Total future payments | $ | 312 |
Less imputed interest | (81 | )
Present value of future lease payments | $ | 231 |
Less current portion of lease obligations | (39 | )
Noncurrent portion of lease obligations | $ | 192 |

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- Definition Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 + Details
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- Definition Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position. + 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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