Segment Information - Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Parenthetical) (Detail) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2018 |
Jun. 30, 2017 |
Jun. 30, 2018 |
Jun. 30, 2017 |
|
| 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 | $ 151.7 | $ 104.5 | $ 262.6 | $ 216.1 |
| X | ||||||||||
- Definition Independent service providers service fee costs. No definition available.
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|