NOTES PAYABLE - Summary of Notes Payable (Parenthetical) (Details) $ in Millions, ¥ in Billions	Sep. 30, 2016 USD ($)	Sep. 30, 2016 JPY (¥)	Jul. 31, 2016	Dec. 31, 2015 JPY (¥)
2.65% senior notes due February 2017
Debt Instrument [Line Items]
Debt instrument, interest rate	2.65%	2.65%		2.65%
Debt instrument, principal amount	$ 400
2.40% senior notes due March 2020
Debt Instrument [Line Items]
Debt instrument, interest rate	2.40%	2.40%		2.40%
Debt instrument, principal amount	$ 550
4.00% senior notes due February 2022
Debt Instrument [Line Items]
Debt instrument, interest rate	4.00%	4.00%		4.00%
Debt instrument, principal amount	$ 350
3.625% senior notes due June 2023
Debt Instrument [Line Items]
Debt instrument, interest rate	3.625%	3.625%		3.625%
Debt instrument, principal amount	$ 700
3.625% senior notes due November 2024
Debt Instrument [Line Items]
Debt instrument, interest rate	3.625%	3.625%		3.625%
Debt instrument, principal amount	$ 750
3.25% senior notes due March 2025
Debt Instrument [Line Items]
Debt instrument, interest rate	3.25%	3.25%		3.25%
Debt instrument, principal amount	$ 450
2.875% senior notes due October 2026
Debt Instrument [Line Items]
Debt instrument, interest rate	2.875%	2.875%
Debt instrument, principal amount	$ 300
6.90% senior notes due December 2039
Debt Instrument [Line Items]
Debt instrument, interest rate	6.90%	6.90%		6.90%
6.45% senior notes due August 2040
Debt Instrument [Line Items]
Debt instrument, interest rate	6.45%	6.45%		6.45%
4.00% senior notes due October 2046
Debt Instrument [Line Items]
Debt instrument, interest rate	4.00%	4.00%
Debt instrument, principal amount	$ 400
5.50% subordinated notes due September 2052
Debt Instrument [Line Items]
Debt instrument, interest rate	5.50%	5.50%		5.50%
Debt instrument, principal amount	$ 500
2.26% yen-denominated Uridashi notes paid September 2016
Debt Instrument [Line Items]
Debt instrument, interest rate	2.26%	2.26%		2.26%
Debt instrument, principal amount | ¥				¥ 8.0
1.84% yen-denominated Samurai notes paid July 2016
Debt Instrument [Line Items]
Debt instrument, interest rate			1.84%	1.84%
Debt instrument, principal amount | ¥				¥ 15.8
Yen-denominated loan variable interest rate due September 2021
Debt Instrument [Line Items]
Debt instrument, interest rate	0.31%	0.31%
Debt instrument, principal amount | ¥		¥ 5.0
Yen-denominated loan variable interest rate due September 2023
Debt Instrument [Line Items]
Debt instrument, interest rate	0.46%	0.46%
Debt instrument, principal amount | ¥		¥ 25.0