Income Taxes (Earliest Tax Year Subject to Examination in Major Tax Jurisdictions) (Details) |
12 Months Ended |
|---|---|
Dec. 31, 2018 | |
| United States | |
| Income Tax Examination | |
| Tax Year | 2013 |
| New York State and New York City | |
| Income Tax Examination | |
| Tax Year | 2007 |
| Hong Kong | |
| Income Tax Examination | |
| Tax Year | 2012 |
| U.K. | |
| Income Tax Examination | |
| Tax Year | 2011 |
| Japan | |
| Income Tax Examination | |
| Tax Year | 2015 |