XML 76 R63.htm IDEA: XBRL DOCUMENT v3.8.0.1
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%