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NOTES PAYABLE - Summary of Notes Payable (Details) - USD ($) $ in Millions | Sep. 30, 2016 | Dec. 31, 2015
--- | --- | ---
Debt Instrument [Line Items] |  |
Notes payable | $ 5,765 | $ 4,971
2.65% senior notes due February 2017 |  |
Debt Instrument [Line Items] |  |
Notes payable | 650 | 651
2.40% senior notes due March 2020 |  |
Debt Instrument [Line Items] |  |
Notes payable | 547 | 546
4.00% senior notes due February 2022 |  |
Debt Instrument [Line Items] |  |
Notes payable | 348 | 348
3.625% senior notes due June 2023 |  |
Debt Instrument [Line Items] |  |
Notes payable | 696 | 696
3.625% senior notes due November 2024 |  |
Debt Instrument [Line Items] |  |
Notes payable | 745 | 744
3.25% senior notes due March 2025 |  |
Debt Instrument [Line Items] |  |
Notes payable | 445 | 445
2.875% senior notes due October 2026 |  |
Debt Instrument [Line Items] |  |
Notes payable | 298 | 0
6.90% senior notes due December 2039 |  |
Debt Instrument [Line Items] |  |
Notes payable | 394 | 393
6.45% senior notes due August 2040 |  |
Debt Instrument [Line Items] |  |
Notes payable | 445 | 445
4.00% senior notes due October 2046 |  |
Debt Instrument [Line Items] |  |
Notes payable | 393 | 0
5.50% subordinated notes due September 2052 |  |
Debt Instrument [Line Items] |  |
Notes payable | 486 | 486
2.26% yen-denominated Uridashi notes paid September 2016 |  |
Debt Instrument [Line Items] |  |
Notes payable | 0 | 66
1.84% yen-denominated Samurai notes paid July 2016 |  |
Debt Instrument [Line Items] |  |
Notes payable | 0 | 131
Yen-denominated loan variable interest rate due September 2021 |  |
Debt Instrument [Line Items] |  |
Notes payable | 49 | 0
Yen-denominated loan variable interest rate due September 2023 |  |
Debt Instrument [Line Items] |  |
Notes payable | 247 | 0
Capitalized Lease Obligations |  |
Debt Instrument [Line Items] |  |
Notes payable | $ 22 | $ 20

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