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Leases | 9 Months Ended
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Sep. 30, 2021
Leases [Abstract] |
Leases | Leases We have operating and finance leases for offices, terrestrial repeaters, data centers and certain equipment. Our leases have remaining lease terms of less than 1 year to 17 years, some of which may include options to extend the leases for up to 5 years, and some of which may include options to terminate the leases within 1 year. We elected the practical expedient to account for the lease and non-lease components as a single component. Additionally, we elected the practical expedient to not recognize right-of-use assets or lease liabilities for short-term leases, which are those leases with a term of twelve months or less at the lease commencement date. The components of lease expense were as follows:
| For the Three Months Ended September 30, |  | For the Nine Months Ended September 30,
| 2021 |  | 2020 |  | 2021 |  | 2020
Operating lease cost | $ | 18 |  |  | $ | 20 |  |  | $ | 60 |  |  | $ | 61 |
Finance lease cost | — |  |  | — |  |  | — |  |  | 1 |
Sublease income | (2) |  |  | — |  |  | (4) |  |  | (1) |
Total lease cost | $ | 16 |  |  | $ | 20 |  |  | $ | 56 |  |  | $ | 61 |
During the nine months ended September 30, 2021, we ceased using certain leased locations and recorded an impairment charge of $18 to write down the carrying value of the right-of-use assets for these locations to their estimated fair values. Refer to Note 4 for additional information.
Leases | Leases We have operating and finance leases for offices, terrestrial repeaters, data centers and certain equipment. Our leases have remaining lease terms of less than 1 year to 17 years, some of which may include options to extend the leases for up to 5 years, and some of which may include options to terminate the leases within 1 year. We elected the practical expedient to account for the lease and non-lease components as a single component. Additionally, we elected the practical expedient to not recognize right-of-use assets or lease liabilities for short-term leases, which are those leases with a term of twelve months or less at the lease commencement date. The components of lease expense were as follows:
| For the Three Months Ended September 30, |  | For the Nine Months Ended September 30,
| 2021 |  | 2020 |  | 2021 |  | 2020
Operating lease cost | $ | 18 |  |  | $ | 20 |  |  | $ | 60 |  |  | $ | 61 |
Finance lease cost | — |  |  | — |  |  | — |  |  | 1 |
Sublease income | (2) |  |  | — |  |  | (4) |  |  | (1) |
Total lease cost | $ | 16 |  |  | $ | 20 |  |  | $ | 56 |  |  | $ | 61 |
During the nine months ended September 30, 2021, we ceased using certain leased locations and recorded an impairment charge of $18 to write down the carrying value of the right-of-use assets for these locations to their estimated fair values. Refer to Note 4 for additional information.

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- Definition The entire disclosure for finance leases of lessee. Includes, but is not limited to, description of lessee's finance lease and maturity analysis of finance 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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- 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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