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Summary of Significant Accounting Policies (Tables) | 9 Months Ended
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Jun. 30, 2021
Accounting Policies [Abstract] |
Restrictions on Cash and Cash Equivalents | The following table provides a reconciliation of the total cash, cash equivalents and restricted cash reported on the Condensed Consolidated Balance Sheets to the corresponding amounts reported on the Condensed Consolidated Statements of Cash Flows.
|  | June 30, 2021 |  | June 30, 2020 |  | September 30, 2020 |  | September 30, 2019
Cash and cash equivalents |  | $ | 545 |  |  | $ | 487 |  |  | $ | 336 |  |  | $ | 447 |
Restricted cash |  | 31 |  |  | 45 |  |  | 21 |  |  | 64 |
Cash, cash equivalents and restricted cash |  | $ | 576 |  |  | $ | 532 |  |  | $ | 357 |  |  | $ | 511 |
Schedule of Cash and Cash Equivalents | The following table provides a reconciliation of the total cash, cash equivalents and restricted cash reported on the Condensed Consolidated Balance Sheets to the corresponding amounts reported on the Condensed Consolidated Statements of Cash Flows.
|  | June 30, 2021 |  | June 30, 2020 |  | September 30, 2020 |  | September 30, 2019
Cash and cash equivalents |  | $ | 545 |  |  | $ | 487 |  |  | $ | 336 |  |  | $ | 447 |
Restricted cash |  | 31 |  |  | 45 |  |  | 21 |  |  | 64 |
Cash, cash equivalents and restricted cash |  | $ | 576 |  |  | $ | 532 |  |  | $ | 357 |  |  | $ | 511 |
Shares Used in Computing Basic and Diluted Earnings Per Share | Shares used in computing basic and diluted earnings per share are as follows:
|  | Three Months Ended June 30, |  | Nine Months Ended June 30,
|  | 2021 |  | 2020 |  | 2021 |  | 2020
Denominator (thousands of shares): |  |  |  |  |  |  |  |
Weighted-average common shares outstanding — basic |  | 209,099 |  |  | 208,598 |  |  | 208,934 |  |  | 208,989 |
Incremental shares issuable for stock options and awards |  | 1,752 |  |  | 377 |  |  | 1,260 |  |  | 1,020 |
Weighted-average common shares outstanding — diluted |  | 210,851 |  |  | 208,975 |  |  | 210,194 |  |  | 210,009 |

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