Goodwill and Intangible Assets - Goodwill (Parenthetical) (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended |
|---|---|---|
Mar. 31, 2017 |
Jun. 30, 2017 |
|
| Columbus Container Inc | ||
| Goodwill [Line Items] | ||
| Adjustment to increase (decrease) goodwill | $ (5.7) | |
| TimBar Corporation | ||
| Goodwill [Line Items] | ||
| Adjustment to increase (decrease) goodwill | $ (1.1) | $ (1.1) |