Goodwill and Intangible Assets - Goodwill (Details) $ in Millions |
6 Months Ended |
|---|---|
|
Jun. 30, 2017
USD ($)
| |
| Goodwill [Line Items] | |
| Balance at January 1, 2017 | $ 737.9 |
| Balance at June 30, 2017 | 731.1 |
| Columbus Container Inc And TimBar Corporation | |
| Goodwill [Line Items] | |
| Acquisitions | $ (6.8) |