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Dividends - Summary of Quarterly Dividend Calendar (Detail)
 6 Months Ended
Jun. 30, 2019
Quarterly Dividend For Q2 2019 [member]  
Disclosure of Dividends [line items]  
Announcement Date Jul. 25, 2019
Ex-Dividend Date Aug. 08, 2019
Record Date Aug. 09, 2019
Payment Date Sep. 11, 2019
Quarterly Dividend For Q3 2019 [member]  
Disclosure of Dividends [line items]  
Announcement Date Oct. 17, 2019
Ex-Dividend Date Oct. 31, 2019
Record Date Nov. 01, 2019
Payment Date Dec. 04, 2019