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Changes in Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2020
Accounting Changes and Error Corrections [Abstract] |
Schedule of Impact of Adopting Topic 326 | The impact of adopting Topic 326 on the accompanying Consolidated Balance Sheets as of January 1, 2020 was as follows (in millions):
Impact on Consolidated Balance Sheets |  | December 31, 2019 |  | Adjustments |  | January 1, 2020
CECL Adoption: |  |  |  |  |  |
Accounts receivable, net of allowance for doubtful accounts of $7.3 |  | $ | 505.0 |  |  | $ | (0.5) |  |  | $ | 504.5 |
Other non-current assets |  | 388.5 |  |  | (6.0) |  |  | 382.5 |
Total assets |  | 6,083.9 |  |  | (6.5) |  |  | 6,077.4 |
Deferred income taxes |  | 131.1 |  |  | (1.7) |  |  | 129.4 |
Total liabilities |  | 4,616.2 |  |  | (1.7) |  |  | 4,614.5 |
Retained earnings |  | 1,401.8 |  |  | (4.8) |  |  | 1,397.0 |
Total liabilities and stockholders’ equity |  | 6,083.9 |  |  | (6.5) |  |  | 6,077.4 |

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