| **Pay vs Performance Disclosure - USD ($) $ in Millions** | 12 Months Ended |
|-----------------------------------------------------------|-----------------|
||
| **Pay vs Performance Disclosure**                         |            |   |   |
| Net income                                                | $ 417.3         | $ 439.4 | $ 249.1 |

| X                                                                                                                                                                                                                                                                                                    |
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| - References
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| - Definition
The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.
+ References
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