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Summary of Significant Accounting Policies and Recent Accounting Pronouncements (Tables) | 12 Months Ended
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Dec. 31, 2020
Accounting Policies [Abstract] |
Reconciliation of cash, cash equivalents and restricted cash | The following table provides a reconciliation of Cash and cash equivalents and restricted cash reported in the Consolidated Balance Sheet to the total of the amounts in the Consolidated Statement of Cash Flows.
December 31, | 2020 |  | 2019
(Dollars in millions) |  |  |
Cash and cash equivalents | $ | 1,271 |  |  | $ | 285 |
Restricted cash included in Other current assets | 20 |  |  | 6 |
Cash, cash equivalents and restricted cash in the statement of cash flows | $ | 1,291 |  |  | $ | 291 |
Implementation costs | Implementation costs related to UScellular's cloud-hosted arrangements, which are recorded in Prepaid expenses and Other assets and deferred charges in the Consolidated Balance Sheet, were as follows:
December 31, | 2020
(Dollars in millions) |
Implementation costs, gross | $ | 67 |
Accumulated amortization | (13) |
Implementation costs, net | $ | 54 |

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- Definition Tabular disclosure of the amounts paid in advance for capitalized costs that will be expensed with the passage of time or the occurrence of a triggering event, and will be charged against earnings within one year or the normal operating cycle, if longer; the aggregate carrying amount of current assets, not separately presented elsewhere in the balance sheet; and other deferred costs. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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