| Finance Receivables [Table Text Block] |
| | June 30, 2020 | | December 31, 2019 | | | Equipment | | | | | Equipment | | | | | | Installment | | Revolving | | Installment | | Revolving | Gross receivables: | $ | 3,931 | | $ | 3,745 | | $ | 4,576 | | $ | 3,324 | Balance sheet classification | | | | | | | | | | | | Accounts receivable | | | | | | | | | | | | Notes receivable | | 2,056 | | | - | | | 2,467 | | | - | Trade receivables | | 496 | | | 3,547 | | | 477 | | | 2,809 | Other Assets | | | | | | | | | | | | Noncurrent notes and trade receivables | | 1,379 | | | 198 | | | 1,632 | | | 515 | | | | | | | | | | | | | | Outstanding portfolio of receivables derecognized from | | | | | | | | | | | | our consolidated balance sheets | | 8,917 | | | 5,300 | | | 9,713 | | | 4,300 | Cash proceeds received, net of remittances1 | | 6,429 | | | 5,300 | | | 7,211 | | | 4,300 | 1 | Represents amounts to which financial institutions remain entitled, excluding the deferred purchase price. |
| | Three months ended | | Six months ended | | | June 30, | | June 30, | | | 2020 | | 2019 | | 2020 | | 2019 | Gross receivables sold | $ | 1,506 | | $ | 2,244 | | $ | 3,873 | | $ | 4,945 | Net receivables sold1 | | 1,449 | | | 2,133 | | | 3,722 | | | 4,679 | Cash proceeds received | | 1,225 | | | 1,920 | | | 3,175 | | | 4,195 | Deferred purchase price recorded | | 232 | | | 261 | | | 585 | | | 570 | Guarantee obligation recorded | | 27 | | | 93 | | | 71 | | | 194 | 1 | Receivables net of allowance, imputed interest and equipment trade-in right guarantees. |
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| Transfer of Financial Assets Accounted for as Sales [Table Text Block] |
| | Three months ended | | Six months ended | | | June 30, | | June 30, | | | 2020 | | 2019 | | 2020 | | 2019 | Gross receivables sold/cash proceeds received1 | $ | 3,805 | | $ | 4,452 | | $ | 8,027 | | $ | 5,852 | Collections reinvested under revolving agreement | | 3,805 | | | 2,127 | | | 7,027 | | | 2,127 | Net cash proceeds received (remitted) | $ | - | | $ | 2,325 | | $ | 1,000 | | $ | 3,725 | | | | | | | | | | | | | | Net receivables sold2 | $ | 3,819 | | $ | 4,134 | | $ | 7,957 | | $ | 5,497 | Obligations recorded (reversed) | | (12) | | | 384 | | | 114 | | | 436 | 1 | Includes initial sale of receivables of $0 and $2,325 for the three months and $1,000 and $3,725 for the six months ended | | June 30, 2020 and 2019, respectively. | | | | | | | | | | | | 2 | Receivables net of allowance, return and incentive reserves and imputed interest |
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