NOTES PAYABLE AND LEASE OBLIGATIONS - Summary of Notes Payable (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Notes payable and lease obligations	$ 7,899	$ 6,569
Finance lease, liability	$ 11	$ 12
Finance lease, liability	us-gaap:DebtAndCapitalLeaseObligations	us-gaap:DebtAndCapitalLeaseObligations
Operating lease, liability	$ 143	$ 149
Operating lease, liability	us-gaap:DebtAndCapitalLeaseObligations	us-gaap:DebtAndCapitalLeaseObligations
4.00% senior notes paid January 2020
Debt Instrument [Line Items]
Notes payable and lease obligations	$ 0	$ 348
3.625% senior notes due June 2023
Debt Instrument [Line Items]
Notes payable and lease obligations	698	698
3.625% senior notes due November 2024
Debt Instrument [Line Items]
Notes payable and lease obligations	747	747
3.25% senior notes due March 2025
Debt Instrument [Line Items]
Notes payable and lease obligations	448	448
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	990	0
6.90% senior notes due December 2039
Debt Instrument [Line Items]
Notes payable and lease obligations	221	220
6.45% senior notes due August 2040
Debt Instrument [Line Items]
Notes payable and lease obligations	254	254
4.00% senior noted 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	119	0
.932% senior notes due January 2027
Debt Instrument [Line Items]
Notes payable and lease obligations	578	545
.500% senior notes due December 2029
Debt Instrument [Line Items]
Notes payable and lease obligations	121	114
.550% senior notes due March 2030
Debt Instrument [Line Items]
Notes payable and lease obligations	127	0
1.159% senior notes due October 2030
Debt Instrument [Line Items]
Notes payable and lease obligations	282	266
.843% senior notes due December 2031
Debt Instrument [Line Items]
Notes payable and lease obligations	90	84
.750% senior notes due March 2032
Debt Instrument [Line Items]
Notes payable and lease obligations	198	0
1.488% senior notes due October 2033
Debt Instrument [Line Items]
Notes payable and lease obligations	146	138
.934% senior notes due December 2034
Debt Instrument [Line Items]
Notes payable and lease obligations	94	88
.830% senior notes due March 2035
Debt Instrument [Line Items]
Notes payable and lease obligations	101	0
1.750% senior notes due October 2038
Debt Instrument [Line Items]
Notes payable and lease obligations	85	81
1.122% senior notes due December 2039
Debt Instrument [Line Items]
Notes payable and lease obligations	61	57
2.108% subordinated notes due October 2047
Debt Instrument [Line Items]
Notes payable and lease obligations	575	543
.963% subordinated bonds due April 2049
Debt Instrument [Line Items]
Notes payable and lease obligations	289	272
Yen-denominated loan variable interest rate due September 2026
Debt Instrument [Line Items]
Notes payable and lease obligations	48	45
Yen-denominated loan variable interest rate due September 2029
Debt Instrument [Line Items]
Notes payable and lease obligations	$ 240	$ 227