Equity (Schedule Of Stock By Class) (Details) (USD $) In Millions			12 Months Ended	6 Months Ended
Jun. 30, 2011	Dec. 31, 2010	Dec. 31, 2010 Beginning Balance [Member]	Dec. 31, 2009 Beginning Balance [Member]	Jun. 30, 2011 Ending Balance [Member]	Jun. 30, 2010 Ending Balance [Member]	Jun. 30, 2011 Treasury Stock Purchases [Member]	Jun. 30, 2010 Treasury Stock Purchases [Member]	Jun. 30, 2011 Stock-Based Compensation [Member]	Jun. 30, 2010 Stock-Based Compensation [Member]
Common Shares Issued	204.9	204.8	204.8	204.5	204.9	204.6			0.1	0.1
Treasury Stock			(0.1)		(0.9)		(0.8)
Treasury stock acquired			$ (3.2)		$ (57.4)		$ (54.1)		$ (0.1)

Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187085-122770

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 12
-Paragraph 10
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Article 3

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 43
-Chapter 1
-Section B
-Paragraph 7
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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Balance Type:	debit
Period Type:	duration