Activity in Deferred Compensation Program (Detail) - USD ($) shares in Millions, $ in Millions |
9 Months Ended | |
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Sep. 30, 2016 |
Sep. 30, 2015 |
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| Stockholders Equity Note [Roll Forward] | ||
| Balance at beginning of period | (1) | |
| Balance at end of period | (1) | |
| Balance at beginning of period | $ 2,470 | |
| Balance at end of period | $ 2,743 | |
| Treasury Stock [Member] | ||
| Stockholders Equity Note [Roll Forward] | ||
| Balance at beginning of period | (1) | (1) |
| Reinvested dividends | 0 | 0 |
| Benefit payments | 0 | 0 |
| Balance at end of period | (1) | (1) |
| Balance at beginning of period | $ (51) | $ (59) |
| Reinvested dividends | (2) | (3) |
| Benefit payments | 9 | 11 |
| Balance at end of period | (44) | (51) |
| Deferred Compensation Obligations | ||
| Stockholders Equity Note [Roll Forward] | ||
| Balance at beginning of period | 51 | 59 |
| Reinvested dividends | 2 | 3 |
| Benefit payments | (9) | (11) |
| Balance at end of period | $ 44 | $ 51 |
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- Definition Deferred Compensation Payment No definition available.
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- Definition Number of shares issued pursuant to the terms of a deferred compensation arrangement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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- Definition Number of shares issued during the period from a dividend reinvestment plan (DRIP). A dividend reinvestment plan allows the shareholders to reinvest dividends paid to them by the entity on new issues of stock by the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Value of stock issued during the period from a dividend reinvestment plan (DRIP). A dividend reinvestment plan allows the holder of the stock to reinvest dividends paid to them by the entity on new issues of stock by the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition 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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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