Annual report pursuant to Section 13 and 15(d)

Consolidated Statements of Cash Flows (Parenthetical)

v3.10.0.1
Consolidated Statements of Cash Flows (Parenthetical)
Dec. 31, 2018
May 19, 2017
Oct. 03, 2016
6.125% senior unsecured notes due 2024      
Debt Instrument [Line Items]      
Debt instrument, interest rate, stated (as a percent) 6.125% 6.125% 6.125%
6.375% senior unsecured notes due 2026      
Debt Instrument [Line Items]      
Debt instrument, interest rate, stated (as a percent) 6.375%