Acquisitions and Divestitures (Divestitures) (Details Textual) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 22, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Sale Price			$ 2,400,000,000
Gain on sale of discontinued operations, net of tax	612,000,000	0
Growth and value plan, cost incurred to date	341,000,000
Segment, Continuing Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Growth and value plan, cost incurred to date	280,000,000
Segment, Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Growth and value plan, cost incurred to date	61,000,000
Unallocated Amount to Segment [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restructuring Charges	44,000,000	33,000,000
Unallocated Amount to Segment [Member] | Segment, Continuing Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restructuring Charges		29,000,000
Unallocated Amount to Segment [Member] | Spin Off Preparation [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restructuring Charges		29,000,000
Unallocated Amount to Segment [Member] | Professional Fees [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restructuring Charges	21,000,000
Unallocated Amount to Segment [Member] | Outsourcing Initiatives [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restructuring Charges	19,000,000
Unallocated Amount to Segment [Member] | Lease Commitment Charges [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Restructuring Charges		$ 8,000,000