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Equity - Additional Information (Detail) (USD $)
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12 Months Ended | |||||
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Dec. 31, 2011
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Dec. 31, 2010
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| Preferred Stock, Authorized | 500,000,000 | 500,000,000 | ||||
| Preferred Stock, Par value | $ 0.01 | $ 0.01 | ||||
| Preferred Stock, Issued | 0 | 0 | ||||
| Preferred Stock, Outstanding | 0 | 0 | ||||
| Noncontrolling interests | $ 510,000,000 | [1] | $ 547,000,000 | [1] | ||
| Noncontrolling Interest amounts related to operating joint ventures, largest | 482,000,000 | 520,000,000 | ||||
| Ownership level in company stock that would potentially trigger anti- takeover effects of preferred share purchase rights | 15 percent or more | |||||
| Preferred stock, exercise price of one one - hundredth share | $ 300 | |||||
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- Definition
Ownership level in company stock that would potentially trigger anti-takeover effects of preferred share purchase rights. No definition available.
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- Definition
Preferred stock, exercise price of one one-hundredth share. No definition available.
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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 is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (that is, noncontrolling interest, previously referred to as minority interest). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Carrying amount of the equity interests owned by noncontrolling shareholders, partners, or other equity holders in joint ventures included in the entity's consolidated financial statements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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
Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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