| 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 Years Ended December 31, | 
 
 | 
 | 
 | 
 | 
 | 
2020 | 
 | 
2019 | 
 
| Operating lease cost | 
 | 
 | 
 | 
 | 
$ | 
82  | 
 | 
 | 
$ | 
80  | 
 | 
 
| Finance lease cost | 
 | 
 | 
 | 
 | 
1  | 
 | 
 | 
4  | 
 | 
 
| Sublease income | 
 | 
 | 
 | 
 | 
(2) | 
 | 
 | 
(3) | 
 | 
 
| Total lease cost | 
 | 
 | 
 | 
 | 
$ | 
81  | 
 | 
 | 
$ | 
81  | 
 | 
 
  
Supplemental cash flow information related to leases was as follows:  
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 
 | 
For the Years Ended December 31, | 
 | 
 | 
 
 | 
2020 | 
 | 
2019 | 
 | 
 | 
 
| Cash paid for amounts included in the measurement of lease liabilities: | 
 | 
 | 
 | 
 | 
 | 
 
| Operating cash flows from operating leases | 
$ | 
79  | 
 | 
 | 
$ | 
70  | 
 | 
 | 
 | 
 
| Financing cash flows from finance leases | 
$ | 
1  | 
 | 
 | 
$ | 
3  | 
 | 
 | 
 | 
 
 | 
 | 
 | 
 | 
 | 
 | 
 
| Right-of-use assets obtained in exchange for lease obligations: | 
 | 
 | 
 | 
 | 
 | 
 
| Operating leases | 
$ | 
7  | 
 | 
 | 
$ | 
83  | 
 | 
 | 
 | 
 
  
Supplemental balance sheet information related to leases was as follows:  
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 
 | 
December 31, 2020 | 
 | 
December 31, 2019 | 
 
| Operating Leases | 
 | 
 | 
 | 
 
| Operating lease right-of-use assets | 
$ | 
427  | 
 | 
 | 
$ | 
466  | 
 | 
 
 | 
 | 
 | 
 | 
 
| Operating lease current liabilities | 
48  | 
 | 
 | 
46  | 
 | 
 
| Operating lease liabilities | 
419  | 
 | 
 | 
456  | 
 | 
 
| Total operating lease liabilities | 
$ | 
467  | 
 | 
 | 
$ | 
502  | 
 | 
 
  
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 
 | 
December 31, 2020 | 
 | 
December 31, 2019 | 
 
| Finance Leases | 
 | 
 | 
 | 
 
| Property and equipment, gross | 
$ | 
8  | 
 | 
 | 
$ | 
15  | 
 | 
 
| Accumulated depreciation | 
(7) | 
 | 
 | 
(12) | 
 | 
 
| Property and equipment, net | 
$ | 
1  | 
 | 
 | 
$ | 
3  | 
 | 
 
 | 
 | 
 | 
 | 
 
| Current maturities of debt | 
$ | 
1  | 
 | 
 | 
$ | 
1  | 
 | 
 
| Long-term debt | 
—  | 
 | 
 | 
1  | 
 | 
 
| Total finance lease liabilities | 
$ | 
1  | 
 | 
 | 
$ | 
2  | 
 | 
 
  
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 
 | 
December 31, 2020 | 
 | 
December 31, 2019 | 
 
| Weighted Average Remaining Lease Term | 
 | 
 | 
 | 
 
| Operating leases | 
9 years | 
 | 
9 years | 
 
| Finance leases | 
1 year | 
 | 
2 years | 
 
  
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 
 | 
December 31, 2020 | 
 | 
December 31, 2019 | 
 
| Weighted Average Discount Rate | 
 | 
 | 
 | 
 
| Operating leases | 
5.3  | 
% | 
 | 
5.3  | 
% | 
 
| Finance leases | 
1.7  | 
% | 
 | 
1.7  | 
% | 
 
  
Maturities of lease liabilities were as follows:   
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 
 | 
Operating Leases | 
 | 
Finance Leases | 
 
| Year ending December 31, | 
 | 
 | 
 | 
 
| 2020 (remaining) | 
$ | 
71  | 
 | 
 | 
$ | 
—  | 
 | 
 
| 2021 | 
74  | 
 | 
 | 
1  | 
 | 
 
| 2022 | 
71  | 
 | 
 | 
—  | 
 | 
 
| 2023 | 
62  | 
 | 
 | 
—  | 
 | 
 
| 2024 | 
62  | 
 | 
 | 
—  | 
 | 
 
| Thereafter | 
247  | 
 | 
 | 
—  | 
 | 
 
| Total future minimum lease payments | 
587  | 
 | 
 | 
1  | 
 | 
 
| Less imputed interest | 
(120) | 
 | 
 | 
—  | 
 | 
 
| Total | 
$ | 
467  | 
 | 
 | 
$ | 
1  | 
 | 
 
  
 |