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Growth and Value Plan & Discontinued Operations (Assets and Liabilities of Discontinued Ops) (Details) (USD $) In Millions, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
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Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Accounts receivable, net | $ 333 | $ 343
Property and equipment, net | 122 | 127
Goodwill | 469 | 944
Other intangible assets, net | 156 | 181
Inventories, net | 235 | 262
Prepublication costs | 304 | 325
Other assets | 321 | 326
Assets held for sale | 1,940 | 2,508
Accounts payable and accrued expenses | 123 | 157
Unearned revenue | 192 | 117
Other liabilities | 349 | 445
Liabilities held for sale | $ 664 | $ 719

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