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NOTES PAYABLE - Summary of Notes Payable (Parenthetical) (Details) $ in Millions, ¥ in Billions | Sep. 30, 2017 USD ($) | Sep. 30, 2017 JPY (¥) | Feb. 28, 2017 | Jan. 31, 2017 JPY (¥) | Dec. 31, 2016 JPY (¥)
--- | --- | --- | --- | --- | ---
2.65% senior notes paid February 2017 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, interest rate |  |  | 2.65% |  | 2.65%
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% |  |  | 2.875%
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% |  |  | 4.00%
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 |  |  |  |
.932% senior notes due January 2027 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, interest rate | 0.932% | 0.932% |  | 0.932% |
Debt instrument, principal amount | ¥ |  | ¥ 60.0 |  | ¥ 60.0 |
Yen-denominated loan variable interest rate due September 2021 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, interest rate | 0.31% | 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% |  |  | 0.46%
Debt instrument, principal amount | ¥ |  | ¥ 25.0 |  |  | ¥ 25.0

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