Investments Investments (Summary of the Companies Voting Control in Entities Where it has Noncontrolling Interest) (Details)	12 Months Ended
Dec. 31, 2012
India \| India Asset Recovery Management Limited [Member]
Voting Interest Owned	0.801
Germany \| VV Immobilien Verwaltungs und Beteiligungs Gmbh [Member]
Voting Interest Owned	.7
Germany \| VV Immobilien Verwaltungs GmbH [Member]
Voting Interest Owned	.7
Germany \| HVH Immobilien und Beteiligungs GmbH [Member]
Voting Interest Owned	.7

Description of voting rights of common stock. Includes eligibility to vote and votes per share owned. Include also, if any, unusual voting rights.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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