DEBT - Narrative (Details) $ / shares in Units, € in Millions	1 Months Ended			3 Months Ended		12 Months Ended
	Mar. 31, 2022 USD ($)	Apr. 30, 2020 USD ($) day $ / shares	Aug. 31, 2019 USD ($)	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Mar. 31, 2022 EUR (€)	Dec. 31, 2021 USD ($)	Dec. 31, 2021 EUR (€)	Mar. 31, 2021 EUR (€)
Debt Instrument
Repayments of Senior Debt				$ 1,102,000,000	$ 0
Revolving Credit Facility
Debt Instrument
Revolving credit facility, maximum borrowing capacity			$ 2,000,000,000
Revolving credit facility, term			5 years
Line of credit, borrowings outstanding	$ 0			0				$ 0
Debt instrument, covenant, pro forma liquidity required for distribution and share repurchases						$ 6,000,000,000
Letter of Credit
Debt Instrument
Revolving credit facility, maximum borrowing capacity			$ 80,000,000
Letters of credit issued	5,000,000			5,000,000				4,000,000
Swingline Loans
Debt Instrument
Revolving credit facility, maximum borrowing capacity			$ 100,000,000
Senior Notes
Debt Instrument
Aggregate principal amount	1,334,000,000			1,334,000,000				1,990,000,000
Level 2
Debt Instrument
Estimated market value of outstanding debt	$ 10,400,000,000			$ 10,400,000,000				$ 12,100,000,000
0.8% Senior Notes Due March 2022 | Senior Notes
Debt Instrument
Aggregate principal amount | €							€ 1,000		€ 1,000
Stated interest rate	0.80%			0.80%			0.80%	0.80%	0.80%
Repayments of Senior Debt	$ 1,100,000,000
Aggregate principal amount								$ 1,137,000,000
Euro-Denominated Debt | Designated as Hedging Instrument | Minimum
Debt Instrument
Carrying value of the portions of euro-denominated debt designated as a net investment hedge				$ 5,000,000,000	2,700,000,000
Euro-Denominated Debt | Designated as Hedging Instrument | Maximum
Debt Instrument
Carrying value of the portions of euro-denominated debt designated as a net investment hedge				$ 5,600,000,000	$ 2,800,000,000
Convertible Debt | 0.75% Convertible Senior Notes due May 2025
Debt Instrument
Aggregate principal amount		$ 863,000,000
Stated interest rate	0.75%	0.75%		0.75%			0.75%	0.75%	0.75%
Payments of debt issuance costs						$ 19,000,000
Conversion price (in dollars per share) | $ / shares		$ 1,886.44
Ratio of closing share price to conversion price as a condition for conversion of the convertible notes, minimum (Percentage)		130.00%
Aggregate principal amount	$ 863,000,000			$ 863,000,000				$ 863,000,000
Convertible Debt | 0.75% Convertible Senior Notes due May 2025 | Minimum
Debt Instrument
Minimum and maximum consecutive days the closing sales price of common stock must exceed a specified percentage of conversion price to trigger conversion feature of note (in days) | day		20
Additional payment to debt holder, settled In shares, aggregate value		$ 0
Convertible Debt | 0.75% Convertible Senior Notes due May 2025 | Maximum
Debt Instrument
Minimum and maximum consecutive days the closing sales price of common stock must exceed a specified percentage of conversion price to trigger conversion feature of note (in days) | day		30
Additional payment to debt holder, settled In shares, aggregate value		$ 235,000,000
Convertible Debt | 0.75% Convertible Senior Notes due May 2025 | Level 2
Debt Instrument
Estimated market value of outstanding debt	1,300,000,000			1,300,000,000				1,300,000,000
Senior Notes
Debt Instrument
Carrying value of long-term debt	$ 8,900,000,000			$ 8,900,000,000				$ 10,200,000,000
Senior Notes | 0.1% (€950 Million) Senior Notes due March 2025
Debt Instrument
Aggregate principal amount | €							€ 950		€ 950
Stated interest rate	0.10%			0.10%			0.10%	0.10%	0.10%	0.10%
Aggregate principal amount	$ 1,057,000,000			$ 1,057,000,000				$ 1,080,000,000		€ 950
Senior Notes | 0.5% (€750 Million) Senior Notes due March 2028
Debt Instrument
Aggregate principal amount | €							€ 750		€ 750
Stated interest rate	0.50%			0.50%			0.50%	0.50%	0.50%	0.50%
Aggregate principal amount	$ 834,000,000			$ 834,000,000				$ 853,000,000		€ 750