NOTES PAYABLE - Summary of Notes Payable (Parenthetical) (Details)	Mar. 31, 2014 3.45% senior notes due August 2015	Dec. 31, 2013 3.45% senior notes due August 2015	Mar. 31, 2014 2.65% senior notes due February 2017 USD ($)	Dec. 31, 2013 2.65% senior notes due February 2017	Mar. 31, 2014 8.50% senior notes due May 2019	Dec. 31, 2013 8.50% senior notes due May 2019	Mar. 31, 2014 4.00% senior notes due February 2022 USD ($)	Dec. 31, 2013 4.00% senior notes due February 2022	Mar. 31, 2014 3.625% senior notes due June 2023 USD ($)	Dec. 31, 2013 3.625% senior notes due June 2023	Mar. 31, 2014 6.90% senior notes due December 2039	Dec. 31, 2013 6.90% senior notes due December 2039	Mar. 31, 2014 6.45% senior notes due August 2040	Dec. 31, 2013 6.45% senior notes due August 2040	Mar. 31, 2014 5.50% subordinated notes due September 2052 USD ($)	Dec. 31, 2013 5.50% subordinated notes due September 2052	Mar. 31, 2014 2.26% yen-denominated Uridashi notes due September 2016 JPY (¥)	Dec. 31, 2013 2.26% yen-denominated Uridashi notes due September 2016 JPY (¥)	Mar. 31, 2014 1.47% yen-denominated Samurai notes due July 2014 JPY (¥)	Dec. 31, 2013 1.47% yen-denominated Samurai notes due July 2014 JPY (¥)	Mar. 31, 2014 1.84% yen-denominated Samurai notes due July 2016 JPY (¥)	Dec. 31, 2013 1.84% yen-denominated Samurai notes due July 2016 JPY (¥)	Mar. 31, 2014 Yen Denominated Samurai Notes Variable Interest Rate Due July Twenty Fourteen JPY (¥)	Dec. 31, 2013 Yen Denominated Samurai Notes Variable Interest Rate Due July Twenty Fourteen JPY (¥)	Mar. 31, 2014 3.60% yen-denominated loan due July 2015 JPY (¥)	Dec. 31, 2013 3.60% yen-denominated loan due July 2015 JPY (¥)	Mar. 31, 2014 3.00% yen-denominated loan due August 2015 JPY (¥)	Dec. 31, 2013 3.00% yen-denominated loan due August 2015 JPY (¥)
Debt Instrument [Line Items]
Notes payable, interest rate	3.45%	3.45%	2.65%	2.65%	8.50%	8.50%	4.00%	4.00%	3.625%	3.625%	6.90%	6.90%	6.45%	6.45%	5.50%	5.50%	2.26%	2.26%	1.47%	1.47%	1.84%	1.84%	1.30%	1.30%	3.60%	3.60%	3.00%	3.00%
Notes payable, principal amount			$ 400,000,000				$ 350,000,000		$ 700,000,000						$ 500,000,000		¥ 8,000,000,000	¥ 8,000,000,000	¥ 28,700,000,000	¥ 28,700,000,000	¥ 15,800,000,000	¥ 15,800,000,000	¥ 5,500,000,000	¥ 5,500,000,000	¥ 10,000,000,000	¥ 10,000,000,000	¥ 5,000,000,000	¥ 5,000,000,000