XML 85 R71.htm IDEA: XBRL DOCUMENT v3.6.0.2
Debt - 2021 Senior Notes (Detail) - 5.25% Senior Notes due 2021 [Member] - Senior Notes [Member] - USD ($)
12 Months Ended
Dec. 31, 2016
Apr. 16, 2013
Debt Instrument [Line Items]    
Senior Notes issued amount   $ 550,000,000
Stated interest rate of senior notes (as a percent) 5.25% 5.25%
Redemption price (as a percent) 101.00%