Cost Classifications (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
---|---|---|---|---|
Jun. 30, 2017 |
Jun. 30, 2016 |
Jun. 30, 2017 |
Jun. 30, 2016 |
|
Costs and Expenses [Abstract] | ||||
Depreciation and amortization not included in direct operating expenses | $ 51.7 | $ 48.4 | $ 100.4 | $ 86.3 |
Depreciation and amortization not included in selling, general and administrative expenses | $ 2.3 | $ 2.3 | $ 4.7 | $ 4.4 |