Acquisitions and Divestitures (Acquisitions) (Narrative) (Details) company in Thousands, $ in Millions	1 Months Ended	6 Months Ended
Mar. 31, 2014 country company	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)
Acquisitions and Divestitures [Abstract]
Minimum Number of Companies Represented in Broad Market Indices \| company	11
Minimum Number of Countries Represented in Broad Market Indices \| country	52
Contingent consideration payment		$ 0	$ 11

Cash outflow representing an adjustment to the purchase price of a previous acquisition.

No definition available.

Name:	us-gaap_PaymentsForPreviousAcquisition
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration