Supplemental Condensed Consolidating Financial Information - Additional Information (Details) - Senior Notes - 5.375% Notes $ in Millions |
Mar. 31, 2018
USD ($)
|
|---|---|
| Condensed Financial Statements, Captions [Line Items] | |
| Aggregate principal amount of notes outstanding | $ 700 |
| Percentage of contractual interest rate on Notes | 5.375% |