Quarterly report pursuant to Section 13 or 15(d)

Segment Information - Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Parenthetical) (Detail)

v3.19.2
Segment Information - Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Parenthetical) (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Selling, General and Administrative Expenses [Member] | China [Member]        
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]        
Independent service providers service fees costs $ 108.2 $ 151.7 $ 184.7 $ 262.6