Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e9038-108599

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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No definition available.

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Segment Information (Summary Of Financial Information By Geographic Location) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 1,676.6	$ 1,586.4	$ 1,600.5	$ 1,551.5	$ 1,752.4	$ 1,834.1	$ 1,797.8	$ 2,147.5	$ 6,415.0	$ 7,531.8	$ 10,325.5
Long-lived assets	347.6				343.6				347.6	343.6	298.4
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									4,980.8	6,239.7	8,917.7
Long-lived assets	339.5				336.8				339.5	336.8	293.9
Foreign countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									1,434.2	1,292.1	1,407.8
Long-lived assets	$ 8.1				$ 6.8				$ 8.1	$ 6.8	$ 4.5