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Income Taxes Schedule of Unrecognized Tax Benefits Activity (Tables) | 12 Months Ended
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Dec. 31, 2021
Income Tax Disclosure [Abstract] |
Schedule of Unrecognized Tax Benefits Activity [Table Text Block] | The table below summarizes the activity related to our unrecognized tax benefits.
| Years ended December 31,
| 2021 |  | 2020 |  | 2019
Balance at beginning of period | $ | 217.6 |  |  | $ | 345.3 |  |  | $ | 335.4 |
Increases as a result of tax positions taken during a prior year | 17.2 |  |  | 18.1 |  |  | 22.7 |
Decreases as a result of tax positions taken during a prior year | (10.4) |  |  | (165.7) |  |  | (25.8) |
Settlements with taxing authorities | (8.7) |  |  | (6.2) |  |  | (8.1) |
Lapse of statutes of limitation | (6.2) |  |  | (0.7) |  |  | (0.6) |
Increases as a result of tax positions taken during the current year | 53.1 |  |  | 26.8 |  |  | 21.7 |
Balance at end of period | $ | 262.6 |  |  | $ | 217.6 |  |  | $ | 345.3 |

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