XML 133 R58.htm IDEA: XBRL DOCUMENT

Summary of Significant Accounting Policies (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Leasehold improvements, useful life	the shorter of the useful life or the remaining lease term
Number of Reporting Units for Purposes of Annual Goodwill Impairment Test	11
Foreign currency transaction pre-tax loss	$ 1.2	$ 0.9	$ 0.7
Minimum [Member]
Buildings, useful life	10 years
Furniture, equipment and computer software costs, useful life minimum	3 years
Finite-Lived Intangible Asset, Useful Life	7 years
Maximum [Member]
Buildings, useful life	35 years
Furniture, equipment and computer software costs, useful life minimum	7 years
Finite-Lived Intangible Asset, Useful Life	15 years

The aggregate foreign currency transaction gain (loss) (both realized and unrealized) included in determining net income for the reporting period. Excludes foreign currency transactions designated as hedges of net investment in a foreign entity and intercompany foreign currency transactions that are of a long-term nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting enterprise's financial statements. For certain enterprises, primarily banks, that are dealers in foreign exchange, foreign currency transaction gains (losses) may be disclosed as dealer gains (losses).

+ References+ Details