LEASES - Narrative (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2022 USD ($) renewal_option	Dec. 31, 2020 USD ($) renewal_option	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Lessee, Lease, Description [Line Items]
Operating lease cost			$ 218,000,000	$ 234,000,000	$ 236,000,000
Operating lease commitments, not yet commenced			69,000,000	69,000,000
Financing lease commitments			0	0
Operating lease commitments			889,000,000	1,100,000,000
Long-term lease liabilities			$ 584,000,000	$ 794,000,000
Weighted average remaining lease term for operating lease			7 years	7 years
Weighted average discount rate for operating lease			5.00%	5.00%
Operating cash flow payments			$ 219,000,000	$ 233,000,000
Right-of-use asset obtained in exchange for operating lease liability			79,000,000	179,000,000
Gain (loss) offset by terminations				40,000,000
Sale leaseback, net proceeds	$ 52,000,000	$ 139,000,000		0
Annual rent payment	$ 2,000,000	$ 10,000,000			10,000,000
Lease term	15 years	14 years
Number of options to extend lease | renewal_option	2	4
Lease renewal term	5 years	5 years
Sale leaseback, deferred gain, gross			44,000,000		113,000,000
Sale leaseback, deferred gain, net			36,000,000		89,000,000
Sale leaseback, right-of-use assets and lease liabilities	$ 32,000,000	$ 128,000,000			128,000,000
Residual value guarantees			$ 334,000,000
Residual value of lease arrangements				$ 264,000,000
Cost of products sold
Lessee, Lease, Description [Line Items]
Sale leaseback, deferred gain, gross					74,000,000
Selling, General and Administrative Expenses
Lessee, Lease, Description [Line Items]
Sale leaseback, deferred gain, gross					$ 39,000,000
Maximum
Lessee, Lease, Description [Line Items]
Operating lease term, not yet commenced			10 years