CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Common shares, par value (in dollars per share)	$ 0.01	$ 0.01
Common shares, shares authorized	1,250,000,000us-gaap_CommonStockSharesAuthorized	1,250,000,000us-gaap_CommonStockSharesAuthorized
Common shares, shares issued	321,981,162us-gaap_CommonStockSharesIssued	320,990,255us-gaap_CommonStockSharesIssued
Treasury shares	140,185,225us-gaap_TreasuryStockShares	137,880,746us-gaap_TreasuryStockShares
Consolidated investment entities [Member]
Receivables, fair value (in dollars)	$ 31	$ 49
Debt, fair value (in dollars)	5,933	6,030
Other liabilities, fair value (in dollars)	$ 119	$ 193

Face amount or stated value per share of common stock.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Fair value portion of other liabilities.

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Fair value portion of receivables, including, but not limited to, trade account receivables, note receivables, and loan receivables.

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Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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