NOTES PAYABLE - Summary of Notes Payable (Detail)	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Dec. 31, 2012 8.50% senior notes due May 2019 USD ($)	Dec. 31, 2011 8.50% senior notes due May 2019 USD ($)	May 31, 2009 8.50% senior notes due May 2019 USD ($)	Dec. 31, 2012 6.45% senior notes due August 2040 USD ($)		Dec. 31, 2011 6.45% senior notes due August 2040 USD ($)		Aug. 31, 2010 6.45% senior notes due August 2040 USD ($)	Dec. 31, 2012 6.90% senior notes due December 2039 USD ($)		Dec. 31, 2011 6.90% senior notes due December 2039 USD ($)		Dec. 31, 2009 6.90% senior notes due December 2039 USD ($)	Dec. 31, 2012 3.45% senior notes due August 2015 USD ($)	Dec. 31, 2011 3.45% senior notes due August 2015 USD ($)	Aug. 31, 2010 3.45% senior notes due August 2015 USD ($)	Dec. 31, 2012 2.65% senior notes due February 2017 USD ($)		Jul. 31, 2012 2.65% senior notes due February 2017 USD ($)	Feb. 29, 2012 2.65% senior notes due February 2017 USD ($)	Dec. 31, 2011 2.65% senior notes due February 2017 USD ($)	Dec. 31, 2012 4.00% senior notes due February 2022 USD ($)		Feb. 29, 2012 4.00% senior notes due February 2022 USD ($)	Dec. 31, 2011 4.00% senior notes due February 2022 USD ($)	Dec. 31, 2012 5.50% subordinated notes due September 2052 USD ($)	Oct. 31, 2012 5.50% subordinated notes due September 2052 USD ($)	Sep. 30, 2012 5.50% subordinated notes due September 2052 USD ($)	Dec. 31, 2011 5.50% subordinated notes due September 2052 USD ($)	Dec. 31, 2012 2.26% yen-denominated Uridashi notes due September 2016 USD ($)	Dec. 31, 2012 2.26% yen-denominated Uridashi notes due September 2016 JPY (¥)	Dec. 31, 2011 2.26% yen-denominated Uridashi notes due September 2016 USD ($)	Dec. 31, 2011 2.26% yen-denominated Uridashi notes due September 2016 JPY (¥)	Sep. 30, 2006 2.26% yen-denominated Uridashi notes due September 2016 JPY (¥)	Dec. 31, 2012 1.47% yen-denominated Samurai notes due July 2014 USD ($)	Dec. 31, 2012 1.47% yen-denominated Samurai notes due July 2014 JPY (¥)	Dec. 31, 2011 1.47% yen-denominated Samurai notes due July 2014 USD ($)	Dec. 31, 2011 1.47% yen-denominated Samurai notes due July 2014 JPY (¥)	Jul. 31, 2011 1.47% yen-denominated Samurai notes due July 2014 JPY (¥)	Dec. 31, 2012 1.87% yen-denominated Samurai notes paid June 2012 USD ($)	Dec. 31, 2011 1.87% yen-denominated Samurai notes paid June 2012 USD ($)	Dec. 31, 2011 1.87% yen-denominated Samurai notes paid June 2012 JPY (¥)	Jun. 30, 2007 1.87% yen-denominated Samurai notes paid June 2012 JPY (¥)	Dec. 31, 2012 1.84% yen-denominated Samurai notes due July 2016 USD ($)	Dec. 31, 2012 1.84% yen-denominated Samurai notes due July 2016 JPY (¥)	Dec. 31, 2011 1.84% yen-denominated Samurai notes due July 2016 USD ($)	Dec. 31, 2011 1.84% yen-denominated Samurai notes due July 2016 JPY (¥)	Jul. 31, 2011 1.84% yen-denominated Samurai notes due July 2016 JPY (¥)	Dec. 31, 2012 Variable interest rate yen-denominated Samurai notes due July 2014 USD ($)	Dec. 31, 2012 Variable interest rate yen-denominated Samurai notes due July 2014 JPY (¥)	Dec. 31, 2011 Variable interest rate yen-denominated Samurai notes due July 2014 USD ($)	Dec. 31, 2011 Variable interest rate yen-denominated Samurai notes due July 2014 JPY (¥)	Jul. 31, 2011 Variable interest rate yen-denominated Samurai notes due July 2014 JPY (¥)	Dec. 31, 2012 3.60% yen-denominated loan due July 2015 USD ($)	Dec. 31, 2012 3.60% yen-denominated loan due July 2015 JPY (¥)	Dec. 31, 2011 3.60% yen-denominated loan due July 2015 USD ($)	Dec. 31, 2011 3.60% yen-denominated loan due July 2015 JPY (¥)	Dec. 31, 2012 3.00% yen-denominated loan due August 2015 USD ($)	Dec. 31, 2012 3.00% yen-denominated loan due August 2015 JPY (¥)	Dec. 31, 2011 3.00% yen-denominated loan due August 2015 USD ($)	Dec. 31, 2011 3.00% yen-denominated loan due August 2015 JPY (¥)	Dec. 31, 2012 Capitalized Lease Obligations USD ($)	Dec. 31, 2011 Capitalized Lease Obligations USD ($)
Debt Instrument [Line Items]
Notes payable	$ 4,352,000,000	$ 3,285,000,000	$ 850,000,000	$ 850,000,000		$ 448,000,000	[1]	$ 448,000,000	[1]		$ 396,000,000	[2]	$ 396,000,000	[2]		$ 300,000,000	$ 300,000,000		$ 657,000,000	[3]			$ 0	$ 349,000,000	[4]		$ 0	$ 500,000,000			$ 0	$ 92,000,000		$ 103,000,000			$ 331,000,000		$ 369,000,000			$ 0	$ 342,000,000			$ 182,000,000		$ 203,000,000			$ 64,000,000		$ 71,000,000			$ 116,000,000		$ 129,000,000		$ 58,000,000		$ 64,000,000		$ 9,000,000	$ 10,000,000
Notes payable, principal amount					850,000,000	450,000,000				450,000,000	400,000,000				400,000,000			300,000,000	650,000,000		250,000,000	400,000,000		350,000,000		350,000,000		450,000,000	50,000,000	450,000,000			8,000,000,000		8,000,000,000	10,000,000,000		28,700,000,000		28,700,000,000	28,700,000,000			26,600,000,000	30,000,000,000		15,800,000,000		15,800,000,000	15,800,000,000		5,500,000,000		5,500,000,000	5,500,000,000		10,000,000,000		10,000,000,000		5,000,000,000		5,000,000,000
Notes payable, underwriting discount						2,000,000					4,000,000													1,000,000
Notes payable, issuance premium																			$ 7,000,000
Notes payable, interest rate			8.50%	8.50%		6.45%		6.45%			6.90%		6.90%			3.45%	3.45%		2.65%		2.65%	2.65%		4.00%		4.00%		5.50%	5.50%	5.50%		2.26%	2.26%	2.26%	2.26%		1.47%	1.47%	1.47%	1.47%	1.47%		1.87%	1.87%		1.84%	1.84%	1.84%	1.84%	1.84%	1.34%	1.34%	1.34%	1.34%	1.475%	3.60%	3.60%	3.60%	3.60%	3.00%	3.00%	3.00%	3.00%

[1] $450 issuance net of a $2 underwriting discount that is being amortized over the life of the notes

[2] $400 issuance net of a $4 underwriting discount that is being amortized over the life of the notes

[3] $650 issuance plus $7 of an issuance premium that is being amortized over the life of the notes

[4] $350 issuance net of a $1 underwriting discount that is being amortized over the life of the notes