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Supplemental Disclosures of Cash Flow Information | 12 Months Ended
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Dec. 31, 2020
Cash And Cash Equivalents [Abstract] |
Supplemental Disclosures of Cash Flow Information | 20. Supplemental Disclosures of Cash Flow Information
|  | Year ended December 31, |
Supplemental disclosures of cash flow information (in millions): |  | 2020 |  |  | 2019 |  |  | 2018 |
Interest paid |  | $ | 188.9 |  |  | $ | 169.2 |  |  | $ | 139.2 |
Income taxes paid, net |  |  | 113.0 |  |  |  | 22.2 |  |  |  | 68.1 |
Income taxes paid in the table above were net of AMT credit and other U.S. federal refunds of ($28.5) million in 2020, ($63.6) million in 2019 and ($2.4) million in 2018. The following is a reconciliation of our end of period cash, cash equivalents and restricted cash balances as presented in the consolidated statement of cash flows for the years ended December 31, 2020, 2019 and 2018 (in millions):
|  | December 31, |
|  | 2020 |  |  | 2019 |  |  | 2018 |
Cash and cash equivalents |  | $ | 664.6 |  |  | $ | 604.8 |  |  | $ | 607.2 |
Restricted cash |  |  | 2,909.7 |  |  |  | 2,019.1 |  |  |  | 1,629.6 |
Total cash, cash equivalents and restricted cash |  | $ | 3,574.3 |  |  | $ | 2,623.9 |  |  | $ | 2,236.8 |
We have a qualified contributory savings and thrift 401(k) plan covering the majority of our domestic employees. For eligible employees who have met the plan’s age and service requirements to receive matching contributions, we historically have matched 100% of pre-tax and Roth elective deferrals up to a maximum of 5.0% of eligible compensation, subject to federal limits on plan contributions and not in excess of the maximum amount deductible for federal income tax purposes. Beginning in 2021, the amount matched by the company will be discretionary and annually determined by management. Employees must be employed and eligible for the plan on the last day of the plan year to receive a matching contribution, subject to certain exceptions enumerated in the plan document. Matching contributions are subject to a five-year graduated vesting schedule and can be funded in cash or company stock. We expensed (net of plan forfeitures) $63.6 million, $59.4 million and $53.9 million related to the plan in 2020, 2019 and 2018, respectively. Our board of directors has authorized use of common stock to fund our 2020 employer matching contributions to the 401(k) plan, which we plan to do in February 2021.

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- Definition The entire disclosure for cash and cash equivalent footnotes, which may include the types of deposits and money market instruments, applicable carrying amounts, restricted amounts and compensating balance arrangements. Cash and equivalents include: (1) currency on hand (2) demand deposits with banks or financial institutions (3) other kinds of accounts that have the general characteristics of demand deposits (4) short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments maturing within three months from the date of acquisition qualify. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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