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Share Repurchase Programs (Narrative) (Details) - 2014 Stock Purchase Plan [Member] - USD ($) $ in Millions | Dec. 31, 2016 | Jan. 29, 2014
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Equity, Class of Treasury Stock [Line Items] |  |
Authorized amount for stock repurchase |  | $ 2,000
Remaining amount available for stock repurchase | $ 1,224 |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
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- Definition Amount remaining of a stock repurchase plan authorized. + References No definition available. + Details
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- Details
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