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Leases | 6 Months Ended
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Jun. 30, 2019
Leases [Abstract] |
Leases | Leases On January 1, 2019, we adopted ASC 842 using the optional transition method provided by ASU 2018-11. Our operating leases primarily consist of real estate leases such as offices, warehouses, and research and development facilities. Our leases have remaining lease terms ranging from 1 year to 11 years, some of which include options to extend the leases for up to 5 years or to terminate the leases within 1 year. Our finance leases are immaterial. Our total operating lease expenses for the three and six months ended June 30, 2019 were $10 million and $19 million, respectively, and were $8 million and $15 million for the three and six months ended June 30, 2018, respectively. The total amount of variable and short term lease payments were immaterial for all periods presented. Supplemental balance sheet and cash flow information related to operating leases is as follows:
| June 30, 2019
Operating lease right-of-use assets | $ | 113 |
Accrued liabilities | 26 |
Operating lease liabilities | 95 |
Total operating lease liabilities | $ | 121 |
Right-of-use assets obtained in exchange for lease obligations: |
Operating leases | $ | 5 |
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases for the six months period | $ | 17 |
Weighted average remaining lease term, years | 6 |
Weighted average discount rate | 5 | %
Lease liability maturities:
| Remainder of 2019 |  | 2020 |  | 2021 |  | 2022 |  | 2023 |  | Thereafter |  | Less Imputed Interest |  | Total
Operating leases | $ | 16 |  |  | $ | 30 |  |  | $ | 25 |  |  | $ | 19 |  |  | $ | 16 |  |  | $ | 34 |  |  | $ | (19 | ) |  | $ | 121 |
As of June 30, 2019, we did not have material additional operating leases that have not yet commenced.

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- Definition The entire disclosure for operating leases of lessee. Includes, but is not limited to, description of operating lease and maturity analysis of operating lease liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=77888251 + Details
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