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Business and Summary of Significant Accounting Policies (Details) $ / shares in Units, $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2021 USD ($) segment $ / shares | Jan. 01, 2022 USD ($) | Dec. 31, 2020 USD ($)
Property, Plant and Equipment [Line Items] |  |  |
Number of operating segments | segment | 1 |  |
Increase in debt | $ 2,490.4 |  | $ 2,312.1
Increase in retained earnings | 4,569.5 |  | 4,005.5
Decrease in additional paid-in-capital | (651.6) |  | (728.9)
Decrease in deferred income tax liability (net) | $ (503.2) |  | $ (423.4)
Accounting Standards Update 2020-06 |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Pro forma earnings per share, diluted (in dollars per share) | $ / shares | $ 13.04 |  |
Accounting Standards Update 2020-06 | Subsequent Event |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Increase in debt |  | $ 101.5 |
Increase in retained earnings |  | 4.5 |
Decrease in additional paid-in-capital |  | 80.6 |
Decrease in deferred income tax liability (net) |  | $ 25.4 |
Equipment | Minimum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Estimated useful lives of fixed assets | 2 years |  |
Equipment | Maximum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Estimated useful lives of fixed assets | 10 years |  |
Computer software | Minimum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Estimated useful lives of fixed assets | 2 years |  |
Computer software | Maximum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Estimated useful lives of fixed assets | 5 years |  |
Buildings | Maximum |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Estimated useful lives of fixed assets | 39 years |  |

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