XML 38 R149.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Information Concerning Guarantor and Non-Guarantor Subsidiaries - General Information (Details)
12 Months Ended
Dec. 31, 2019
USD ($)
entity
Sep. 30, 2019
USD ($)
Apr. 15, 2015
USD ($)
Apr. 03, 2013
USD ($)
Condensed Financial Statements, Captions [Line Items]        
Number of wholly-owned subsidiaries | entity 4      
Ownership percentage in subsidiaries (as a percent) 100.00%      
Senior Notes [Member] | $350 Million 5% Senior Notes [Member]        
Condensed Financial Statements, Captions [Line Items]        
Face amount $ 350,000,000 $ 350,000,000   $ 350,000,000.0
Stated interest rate (as a percent) 5.00% 5.00%   5.00%
Senior Notes [Member] | $400 Million 5% Senior Notes [Member]        
Condensed Financial Statements, Captions [Line Items]        
Face amount $ 400,000,000   $ 400,000,000  
Stated interest rate (as a percent) 5.00%   5.00%  
Senior Notes [Member] | $700 Million 4.75% Senior Notes        
Condensed Financial Statements, Captions [Line Items]        
Face amount $ 700,000,000      
Stated interest rate (as a percent) 4.75%