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NOTES PAYABLE AND LEASE OBLIGATIONS - Summary of Notes Payable (Details) - USD ($) $ in Millions | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Debt Instrument [Line Items] |  |
Notes payable and lease obligations | $ 8,066 | $ 7,899
Finance lease obligations | 13 | 11
Operating lease obligations | 116 | 143
3.625% senior notes paid May 2021 |  |
Debt Instrument [Line Items] |  |
Notes payable and lease obligations | 0 | 698
3.625% senior notes due November 2024 |  |
Debt Instrument [Line Items] |  |
Notes payable and lease obligations | 748 | 747
3.25% senior notes due March 2025 |  |
Debt Instrument [Line Items] |  |
Notes payable and lease obligations | 448 | 448
1.125% senior sustainability notes due March 2026 |  |
Debt Instrument [Line Items] |  |
Notes payable and lease obligations | 397 | 0
2.875% senior notes due October 2026 |  |
Debt Instrument [Line Items] |  |
Notes payable and lease obligations | 298 | 298
3.60% senior notes due April 2030 |  |
Debt Instrument [Line Items] |  |
Notes payable and lease obligations | 991 | 990
6.90% senior notes due December 2039 |  |
Debt Instrument [Line Items] |  |
Notes payable and lease obligations | 221 | 221
6.45% senior notes due August 2040 |  |
Debt Instrument [Line Items] |  |
Notes payable and lease obligations | 255 | 254
4.00% senior notes due October 2046 |  |
Debt Instrument [Line Items] |  |
Notes payable and lease obligations | 394 | 394
4.750% senior notes due January 2049 |  |
Debt Instrument [Line Items] |  |
Notes payable and lease obligations | 541 | 541
.300% senior notes due September 2025 |  |
Debt Instrument [Line Items] |  |
Notes payable and lease obligations | 110 | 119
.932% senior notes due January 2027 |  |
Debt Instrument [Line Items] |  |
Notes payable and lease obligations | 534 | 578
.500% senior notes due December 2029 |  |
Debt Instrument [Line Items] |  |
Notes payable and lease obligations | 112 | 121
.550% senior notes due March 2030 |  |
Debt Instrument [Line Items] |  |
Notes payable and lease obligations | 118 | 127
1.159% senior notes due October 2030 |  |
Debt Instrument [Line Items] |  |
Notes payable and lease obligations | 261 | 282
.633% senior notes due April 2031 |  |
Debt Instrument [Line Items] |  |
Notes payable and lease obligations | 266 | 0
.843% senior notes due December 2031 |  |
Debt Instrument [Line Items] |  |
Notes payable and lease obligations | 83 | 90
.750% senior notes due March 2032 |  |
Debt Instrument [Line Items] |  |
Notes payable and lease obligations | 183 | 198
.844% senior notes due April 2033 |  |
Debt Instrument [Line Items] |  |
Notes payable and lease obligations | 107 | 0
1.488% senior notes due October 2033 |  |
Debt Instrument [Line Items] |  |
Notes payable and lease obligations | 135 | 146
.934% senior notes due December 2034 |  |
Debt Instrument [Line Items] |  |
Notes payable and lease obligations | 87 | 94
.830% senior notes due March 2035 |  |
Debt Instrument [Line Items] |  |
Notes payable and lease obligations | 94 | 101
1.039% senior notes due April 2036 |  |
Debt Instrument [Line Items] |  |
Notes payable and lease obligations | 88 | 0
1.750% senior notes due October 2038 |  |
Debt Instrument [Line Items] |  |
Notes payable and lease obligations | 79 | 85
1.122% senior notes due December 2039 |  |
Debt Instrument [Line Items] |  |
Notes payable and lease obligations | 56 | 61
1.264% senior notes due April 2041 |  |
Debt Instrument [Line Items] |  |
Notes payable and lease obligations | 89 | 0
2.108% subordinated notes due October 2047 |  |
Debt Instrument [Line Items] |  |
Notes payable and lease obligations | 532 | 575
.963% subordinated bonds due April 2049 |  |
Debt Instrument [Line Items] |  |
Notes payable and lease obligations | 267 | 289
1.560% senior notes due April 2051 |  |
Debt Instrument [Line Items] |  |
Notes payable and lease obligations | 177 | 0
Yen-denominated loan variable interest rate due September 2026 |  |
Debt Instrument [Line Items] |  |
Notes payable and lease obligations | 44 | 48
Yen-denominated loan variable interest rate due September 2029 |  |
Debt Instrument [Line Items] |  |
Notes payable and lease obligations | $ 222 | $ 240

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