DEBT - Narrative (Details) $ / shares in Units, € in Millions		1 Months Ended				3 Months Ended		6 Months Ended		12 Months Ended
		Mar. 31, 2022 USD ($)	Apr. 30, 2021 USD ($)	Apr. 30, 2020 USD ($) day $ / shares	Aug. 31, 2019 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)	Jun. 30, 2022 EUR (€)	Mar. 31, 2022 EUR (€)	Dec. 31, 2021 USD ($)	Dec. 31, 2021 EUR (€)	Mar. 31, 2021 EUR (€)
Debt Instrument
Loss on early extinguishment of debt	[1]					$ 0	$ 242,000,000	$ 0	$ 242,000,000
Level 2
Debt Instrument
Estimated market value of outstanding debt						$ 9,500,000,000		$ 9,500,000,000					$ 12,100,000,000
0.8% (€1 Billion) 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%
Repayments of Senior Debt		$ 1,100,000,000
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%
Convertible Debt | 0.75% Convertible Senior Notes due May 2025 | Level 2
Debt Instrument
Estimated market value of outstanding debt						$ 1,000,000,000		$ 1,000,000,000					$ 1,300,000,000
Senior Notes
Debt Instrument
Carrying value of long-term debt						$ 8,600,000,000		$ 8,600,000,000					$ 10,200,000,000
Senior Notes | 0.1% (€950 Million) Senior Notes due March 2025
Debt Instrument
Aggregate principal amount | €											€ 950			€ 950	€ 950
Stated interest rate						0.10%		0.10%			0.10%		0.10%	0.10%	0.10%
Senior Notes | 0.5% (€750 Million) Senior Notes due March 2028
Debt Instrument
Aggregate principal amount | €											€ 750			€ 750	€ 750
Stated interest rate						0.50%		0.50%			0.50%		0.50%	0.50%	0.50%
Senior Notes | 4.1% Senior Notes due April 2025
Debt Instrument
Payments to redeem debt			$ 1,100,000,000
Senior Notes | 4.5% Senior Notes Due April 2027
Debt Instrument
Payments to redeem debt			$ 868,000,000
Senior Notes | 4.1% Senior Notes due April 2025 and 4.5% Senior Notes due April 2027
Debt Instrument
Loss on early extinguishment of debt							$ 242,000,000		242,000,000
Minimum | Euro-Denominated Debt | Designated as Hedging Instrument
Debt Instrument
Carrying value of the portions of euro-denominated debt designated as a net investment hedge								$ 4,200,000,000	2,500,000,000
Minimum | Convertible Debt | 0.75% Convertible Senior Notes due May 2025
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
Maximum | Euro-Denominated Debt | Designated as Hedging Instrument
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
Maximum | Convertible Debt | 0.75% Convertible Senior Notes due May 2025
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
Revolving Credit Facility
Debt Instrument
Revolving credit facility, maximum borrowing capacity					$ 2,000,000,000
Revolving credit facility, term					5 years
Long-term Line of Credit						$ 0		0					$ 0
Letter of Credit
Debt Instrument
Revolving credit facility, maximum borrowing capacity					$ 80,000,000
Letters of credit issued						$ 9,000,000		$ 9,000,000					$ 4,000,000
Swingline Loans
Debt Instrument
Revolving credit facility, maximum borrowing capacity					$ 100,000,000

[1] See Note 9 for additional information related to the loss on early extinguishment of debt.