Acquisitions (Detail) (USD $) In Millions, unless otherwise specified	Apr. 02, 2013 Fianzas Monterrey [Member]	May 02, 2013 ABA Seguros [Member]	Jan. 03, 2013 PT Asuransi Jaya Proteksi (JaPro) [Member]	Sep. 18, 2012 PT Asuransi Jaya Proteksi (JaPro) [Member]
Business Acquisition [Line Items]
Acquisition purchase price	$ 293	$ 690	$ 107
Business Acquisition, Percentage of Voting Interests Acquired			20.00%	80.00%
Business Acquisition, Purchase Price Allocation, Goodwill Amount	117	235
Business Acquisition, Purchase Price Allocation, Intangible Assets Other than Goodwill	$ 73	$ 142

Amount of goodwill arising from a business combination, which is the excess of the cost of the acquired entity over the amounts assigned to assets acquired and liabilities assumed.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 52

-Subparagraph c

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 53

-Subparagraph d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant