Property, Plant, and Equipment - Components of Property, Plant, and Equipment (Details) - USD ($) $ in Millions |
Mar. 31, 2019 |
Dec. 31, 2018 |
|---|---|---|
| Property, Plant, And Equipment [Line Items] | ||
| Property, plant and equipment, at cost | $ 6,764.0 | $ 6,691.1 |
| Less accumulated depreciation | (3,654.2) | (3,582.5) |
| Total | 3,109.8 | 3,108.6 |
| Land and Land Improvements | ||
| Property, Plant, And Equipment [Line Items] | ||
| Property, plant and equipment, at cost | 165.6 | 161.9 |
| Buildings | ||
| Property, Plant, And Equipment [Line Items] | ||
| Property, plant and equipment, at cost | 806.6 | 795.5 |
| Machinery and Equipment | ||
| Property, Plant, And Equipment [Line Items] | ||
| Property, plant and equipment, at cost | 5,522.0 | 5,481.6 |
| Construction in Progress | ||
| Property, Plant, And Equipment [Line Items] | ||
| Property, plant and equipment, at cost | 193.9 | 176.7 |
| Other | ||
| Property, Plant, And Equipment [Line Items] | ||
| Property, plant and equipment, at cost | $ 75.9 | $ 75.4 |