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Summary of Significant Accounting Policies (Tables) | 6 Months Ended
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Jun. 30, 2021
Summary of Significant Accounting Policies [Abstract] |
Allowance for Credit Losses | The following table presents our allowance for credit losses activity since December 31, 2020:
Allowance for credit losses, December 31, 2020 |  | $ | 46.5 |
Charged to costs and expenses |  |  | 2.3 |
Charged to other accounts |  |  | 4.4 |
Deductions |  |  | (3.2 | )
Allowance for credit losses, June 30, 2021 |  | $ | 50.0 |
Cash, Cash Equivalents and Restricted Cash | The following table provides a reconciliation of cash and cash equivalents, and restricted cash reported within the Unaudited Condensed Consolidated Balance Sheets that sum to the total of the amounts shown in the Unaudited Condensed Statements of Consolidated Cash Flows.
|  | June 30, 2021 |  |  | December 31, 2020 |
Cash and cash equivalents |  | $ | 404.5 |  |  | $ | 1,059.9 |
Restricted cash |  |  | 206.5 |  |  |  | 98.2 |
Total cash, cash equivalents and restricted cash shown in the Unaudited Condensed Statements of Consolidated Cash Flows |  | $ | 611.0 |  |  | $ | 1,158.1 |

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- Definition Tabular disclosure of allowance for credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 + Details
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