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NOTES PAYABLE - Summary of Notes Payable (Details) - USD ($) $ in Millions | Sep. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Debt Instrument [Line Items] |  |
Notes payable | $ 5,248 | $ 5,360
2.65% senior notes paid February 2017 |  |
Debt Instrument [Line Items] |  |
Notes payable | 0 | 649
2.40% senior notes due March 2020 |  |
Debt Instrument [Line Items] |  |
Notes payable | 545 | 547
4.00% senior notes due February 2022 |  |
Debt Instrument [Line Items] |  |
Notes payable | 346 | 348
3.625% senior notes due June 2023 |  |
Debt Instrument [Line Items] |  |
Notes payable | 694 | 696
3.625% senior notes due November 2024 |  |
Debt Instrument [Line Items] |  |
Notes payable | 743 | 745
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 | 298
6.90% senior notes due December 2039 |  |
Debt Instrument [Line Items] |  |
Notes payable | 221 | 220
6.45% senior notes due August 2040 |  |
Debt Instrument [Line Items] |  |
Notes payable | 256 | 254
4.00% senior notes due October 2046 |  |
Debt Instrument [Line Items] |  |
Notes payable | 394 | 394
5.50% subordinated notes due September 2052 |  |
Debt Instrument [Line Items] |  |
Notes payable | 494 | 486
.932% senior notes due January 2027 |  |
Debt Instrument [Line Items] |  |
Notes payable | 529 | 0
Yen-denominated loan variable interest rate due September 2021 |  |
Debt Instrument [Line Items] |  |
Notes payable | 44 | 43
Yen-denominated loan variable interest rate due September 2023 |  |
Debt Instrument [Line Items] |  |
Notes payable | 221 | 214
Capitalized lease obligations |  |
Debt Instrument [Line Items] |  |
Notes payable | $ 18 | $ 21

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