Annual Future Minimum Payments under Capital Leases and Noncancelable Operating Leases (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011
Leases Disclosure
2012	$ 92
2013	87
2014	82
2015	78
2016	71
Thereafter	441
Total minimum lease payments	851
2012	12
2013	5
2014	4
2015	3
2016	1
Thereafter	1
Total minimum lease payments	26
Amounts representing interest	3
Present value of net minimum lease payments	$ 23

The total of contractually required rental payments on leases meeting the criteria for capitalization.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 13

-Paragraph 16

-Subparagraph a(ii)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 Accounting Standards Codification

-Topic 840

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737