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Capital and Accumulated Other Comprehensive Income (Loss) - Additional Information (Detail) (USD $)
In Millions, except Share data, unless otherwise specified |
3 Months Ended | ||
|---|---|---|---|
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Jun. 30, 2012
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Dec. 31, 2011
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Jun. 30, 2011
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| Class of Stock [Line Items] | |||
| Treasury shares restored as unissued status | 19,000,000 | ||
| Treasury shares | 2,474,996 | 19,289,690 | 19,270,341 |
| Common stock, stated value | $ 1 | $ 1 | $ 1 |
| Number of common stock shares held in connection with deferred compensation plans | 234,301 | 238,275 | 241,059 |
| Common Stock held in trust in connection with deferred compensation plans | $ 11.2 | $ 11.0 | $ 10.4 |
| Preferred Stock, authorized shares | 25,000,000 | ||
| Preferred Stock, par value | $ 1 |
| X | ||||||||||
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- Details
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- Definition
Face amount or stated value of common stock per share; generally not indicative of the fair market value per share. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Value of common stock issued to a trust (for example, but not limited to, rabbi trust) set up specifically to accumulate stock for the sole purpose of distribution to participating employees. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Face amount or stated value per share of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer); generally not indicative of the fair market value per share. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws. 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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| X | ||||||||||
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- Definition
Number of Common Stock shares held in trust ('Rabbi Trust'). No definition available.
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| X | ||||||||||
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- Definition
Number of treasury stock shares (units) restored from treasury stock to unissued. No definition available.
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