Organization and Basis of Presentation Organization (Details)	Dec. 31, 2017 Employees Countries Facilities
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Entity Number of Employees \| Employees	25,000
Number of Facilities \| Facilities	90
Number of Countries in which Entity Operates \| Countries	17

The number of countries in which the entity operates as of balance sheet date.

No definition available.

Name:	us-gaap_NumberOfCountriesInWhichEntityOperates
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant