| **Operating Leases, Commitments and Contingencies, and Guarantees (Narrative) (Detail) (USD $)In Millions, unless otherwise specified** | 12 Months Ended                                                                                                                            |
|-----------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------|
||
| **Loss Contingencies [Line Items]**                                                                                                     |                                                                                                                                       |   |   |
| Guarantor Obligations, Maximum Exposure, Undiscounted                                                                                   | $ 1,900us-gaap_GuaranteeObligationsMaximumExposure                                                                                         |   |   |
| Operating Leases, Rent Expense                                                                                                          | 55us-gaap_LeaseAndRentalExpense                                                                                                            | 46us-gaap_LeaseAndRentalExpense | 52us-gaap_LeaseAndRentalExpense |
| Operating Leases, Income Statement, Sublease Revenue                                                                                    | 1us-gaap_OperatingLeasesIncomeStatementSubleaseRevenue                                                                                     | 3us-gaap_OperatingLeasesIncomeStatementSubleaseRevenue | 2us-gaap_OperatingLeasesIncomeStatementSubleaseRevenue |
| Guarantee Obligations [Member]                                                                                                          |                                                                                                                                       |   |   |
| **Loss Contingencies [Line Items]**                                                                                                     |                                                                                                                                       |   |   |
| Guarantor Obligations, Maximum Exposure, Undiscounted                                                                                   | 375us-gaap_GuaranteeObligationsMaximumExposure/ us-gaap_LossContingenciesByNatureOfContingencyAxis= us-gaap_GuaranteeObligationsMember     |   |   |
| Indemnification Agreement [Member]                                                                                                      |                                                                                                                                       |   |   |
| **Loss Contingencies [Line Items]**                                                                                                     |                                                                                                                                       |   |   |
| Guarantor Obligations, Maximum Exposure, Undiscounted                                                                                   | 324us-gaap_GuaranteeObligationsMaximumExposure/ us-gaap_LossContingenciesByNatureOfContingencyAxis= us-gaap_IndemnificationGuaranteeMember |   |   |
| Property Lease Guarantee [Member]                                                                                                       |                                                                                                                                       |   |   |
| **Loss Contingencies [Line Items]**                                                                                                     |                                                                                                                                       |   |   |
| Guarantor Obligations, Maximum Exposure, Undiscounted                                                                                   | $ 50us-gaap_GuaranteeObligationsMaximumExposure/ us-gaap_LossContingenciesByNatureOfContingencyAxis= us-gaap_PropertyLeaseGuaranteeMember  |   |   |

| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248
+ Details**Name:**us-gaap_GuaranteeObligationsMaximumExposure**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**credit**Period Type:**instant |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                              |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.
+ References
No definition available.
+ Details**Name:**us-gaap_LeaseAndRentalExpense**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**debit**Period Type:**duration |
| X                                                                                                                                                              |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_LossContingenciesLineItems**Namespace Prefix:**us-gaap_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of revenue recognized for the period under subleasing arrangements.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 55 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6584307&loc=d3e41620-112719
+ Details**Name:**us-gaap_OperatingLeasesIncomeStatementSubleaseRevenue**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**credit**Period Type:**duration |
| X                                                                                                                                                                             |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_LossContingenciesByNatureOfContingencyAxis=us-gaap_GuaranteeObligationsMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                                                                 |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_LossContingenciesByNatureOfContingencyAxis=us-gaap_IndemnificationGuaranteeMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |
| X                                                                                                                                                                               |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_LossContingenciesByNatureOfContingencyAxis=us-gaap_PropertyLeaseGuaranteeMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |