DEBT - Debt Outstanding (Details) - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Total short-term debt	$ 1,690,000,000	$ 1,953,000,000
Total long-term debt	11,285,000,000	10,541,000,000
Commercial paper
Debt Instrument [Line Items]
Short-term debt	691,000,000	955,000,000
Senior notes
Debt Instrument [Line Items]
Long-term debt, current maturities	999,000,000	998,000,000
Total long-term debt	8,785,000,000	8,041,000,000
Senior notes | $600 million, 3.150% due December 1, 2022
Debt Instrument [Line Items]
Aggregate principal	$ 600,000,000
Stated interest rate (percent)	3.15%
Long-term debt, current maturities	$ 600,000,000	599,000,000
Senior notes | $400 million, 2.900% due December 15, 2022
Debt Instrument [Line Items]
Aggregate principal	$ 400,000,000
Stated interest rate (percent)	2.90%
Long-term debt, current maturities	$ 399,000,000	399,000,000
Senior notes | $1.5 billion, 0.650% due August 3, 2023
Debt Instrument [Line Items]
Aggregate principal	$ 1,500,000,000
Stated interest rate (percent)	0.65%
Total long-term debt	$ 1,494,000,000	1,492,000,000
Senior notes | $600 million, 3.850% due October 1, 2024
Debt Instrument [Line Items]
Aggregate principal	$ 600,000,000
Stated interest rate (percent)	3.85%
Total long-term debt	$ 598,000,000	598,000,000
Senior notes | $600 million, 4.500% due April 1, 2025
Debt Instrument [Line Items]
Aggregate principal	$ 600,000,000
Stated interest rate (percent)	4.50%
Total long-term debt	$ 596,000,000	596,000,000
Senior notes | $750 million, 1.350% due February 3, 2027
Debt Instrument [Line Items]
Aggregate principal	$ 750,000,000
Stated interest rate (percent)	1.35%
Total long-term debt	$ 742,000,000	742,000,000
Senior notes | $600 million, 3.950% due March 15, 2027
Debt Instrument [Line Items]
Aggregate principal	$ 600,000,000
Stated interest rate (percent)	3.95%
Total long-term debt	$ 596,000,000	596,000,000
Senior notes | $750 million, 3.700% due March 23, 2029
Debt Instrument [Line Items]
Aggregate principal	$ 750,000,000
Stated interest rate (percent)	3.70%
Total long-term debt	$ 741,000,000	0
Senior notes | $500 million, 3.125% due August 15, 2029
Debt Instrument [Line Items]
Aggregate principal	$ 500,000,000
Stated interest rate (percent)	3.125%
Total long-term debt	$ 496,000,000	496,000,000
Senior notes | $500 million, 4.875% due April 1, 2030
Debt Instrument [Line Items]
Aggregate principal	$ 500,000,000
Stated interest rate (percent)	4.875%
Total long-term debt	$ 495,000,000	495,000,000
Senior notes | $750 million, 2.150% due February 3, 2032
Debt Instrument [Line Items]
Aggregate principal	$ 750,000,000
Stated interest rate (percent)	2.15%
Total long-term debt	$ 741,000,000	741,000,000
Senior notes | $250 million, 8.150% due June 15, 2038
Debt Instrument [Line Items]
Aggregate principal	$ 250,000,000
Stated interest rate (percent)	8.15%
Total long-term debt	$ 261,000,000	261,000,000
Senior notes | $400 million, 4.625% due December 1, 2042
Debt Instrument [Line Items]
Aggregate principal	$ 400,000,000
Stated interest rate (percent)	4.625%
Total long-term debt	$ 396,000,000	396,000,000
Senior notes | $750 million, 4.950% due October 1, 2044
Debt Instrument [Line Items]
Aggregate principal	$ 750,000,000
Stated interest rate (percent)	4.95%
Total long-term debt	$ 740,000,000	740,000,000
Senior notes | $400 million, 4.800% due March 15, 2047
Debt Instrument [Line Items]
Aggregate principal	$ 400,000,000
Stated interest rate (percent)	4.80%
Total long-term debt	$ 396,000,000	395,000,000
Senior notes | $500 million, 3.950% due August 15, 2049
Debt Instrument [Line Items]
Aggregate principal	$ 500,000,000
Stated interest rate (percent)	3.95%
Total long-term debt	$ 493,000,000	493,000,000
Term loan
Debt Instrument [Line Items]
Total long-term debt	2,500,000,000	2,500,000,000
Term loan | Term loan, due October 29, 2023
Debt Instrument [Line Items]
Total long-term debt	2,000,000,000	2,000,000,000
Term loan | Delayed draw term loan, due May 28, 2024
Debt Instrument [Line Items]
Total long-term debt	$ 500,000,000	$ 500,000,000