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COMMITMENTS AND CONTINGENCIES - Schedule of Future Minimum Lease Payments (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Operating Leases      
2022 $ 106    
2023 75    
2024 58    
2025 7    
2026 7    
Thereafter 18    
Total future minimum payments 271    
Less: imputed interest (22)    
Total lease liabilities 249    
Current portion 99 $ 116  
Non-current portion $ 150    
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] Other current liabilities (Note 8) ($15 and $4 related to Altus VIE) Other current liabilities (Note 8) ($15 and $4 related to Altus VIE)  
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] Other ($67 and $144 related to Altus VIE) Other ($67 and $144 related to Altus VIE)  
Finance Leases      
2022 $ 3    
2023 3    
2024 3    
2025 4    
2026 4    
Thereafter 25    
Total future minimum payments 42    
Less: imputed interest (6)    
Total lease liabilities 36 $ 38  
Current portion 2    
Non-current portion 34    
Purchase Obligations      
2022 230    
2023 199    
2024 161    
2025 159    
2026 3,637    
Thereafter 463    
Total future minimum payments 4,849    
Total costs under take or pay and throughout obligation 194 $ 120 $ 111
Purchase commitment, remaining minimum amount committed $ 3,500