NOTES PAYABLE Summary of Notes Payable (Details) $ in Millions, ¥ in Billions	Dec. 31, 2016 USD ($)	Dec. 31, 2016 JPY (¥)	Sep. 30, 2016 USD ($)	Sep. 30, 2016 JPY (¥)	Jul. 31, 2016	Dec. 31, 2015 JPY (¥)	Mar. 31, 2015 USD ($)	Nov. 30, 2014 USD ($)	Jun. 30, 2013 USD ($)	Oct. 31, 2012 USD ($)	Sep. 30, 2012 USD ($)	Jul. 31, 2012 USD ($)	Feb. 29, 2012 USD ($)	Aug. 31, 2010 USD ($)	Dec. 31, 2009 USD ($)
2.65% senior notes due February 2017
Debt Instrument [Line Items]
Debt instrument, interest rate	2.65%	2.65%				2.65%						2.65%	2.65%
Debt instrument, principal amount	$ 400											$ 250	$ 400
2.40% senior notes due March 2020
Debt Instrument [Line Items]
Debt instrument, interest rate	2.40%	2.40%				2.40%	2.40%
Debt instrument, principal amount	$ 550						$ 550
4.00% senior notes due February 2022
Debt Instrument [Line Items]
Debt instrument, interest rate	4.00%	4.00%				4.00%							4.00%
Debt instrument, principal amount	$ 350												$ 350
3.625% senior notes due June 2023
Debt Instrument [Line Items]
Debt instrument, interest rate	3.625%	3.625%				3.625%			3.625%
Debt instrument, principal amount	$ 700								$ 700
3.625% senior notes due November 2024
Debt Instrument [Line Items]
Debt instrument, interest rate	3.625%	3.625%				3.625%		3.625%
Debt instrument, principal amount	$ 750							$ 750
3.25% senior notes due March 2025
Debt Instrument [Line Items]
Debt instrument, interest rate	3.25%	3.25%				3.25%	3.25%
Debt instrument, principal amount	$ 450						$ 450
2.875% senior notes due October 2026
Debt Instrument [Line Items]
Debt instrument, interest rate	2.875%	2.875%	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%
Debt instrument, principal amount															$ 400
6.45% senior notes due August 2040
Debt Instrument [Line Items]
Debt instrument, interest rate	6.45%	6.45%				6.45%
Debt instrument, principal amount														$ 450
4.00% senior notes due October 2046
Debt Instrument [Line Items]
Debt instrument, interest rate	4.00%	4.00%	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%				5.50%	5.50%
Debt instrument, principal amount	$ 500									$ 50	$ 450
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		¥ 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		¥ 25.0