Property, Plant and Equipment - Summary of Property, Plant and Equipment (Footnote) (Details) - USD ($) $ in Millions |
Dec. 31, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Property, Plant and Equipment [Abstract] | ||
| Internal-use software development cost | $ 73.0 | $ 60.7 |
| Internal-use software development cost, accumulated amortization | $ 31.1 | $ 22.2 |