Quarterly report pursuant to Section 13 or 15(d)

ACQUISITIONS - AK Steel Intangible Assets and Liabilities (Details)

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ACQUISITIONS - AK Steel Intangible Assets and Liabilities (Details) - AK Steel
$ in Millions
3 Months Ended
Mar. 31, 2021
USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]  
Total identifiable intangible assets $ 148
Weighted Average Life (In Years) 17 years
Above-market supply contracts $ (71)
Above-market supply contract, Weighted Average Useful Life (in years) 12 years
Customer relationships  
Acquired Finite-Lived Intangible Assets [Line Items]  
Total identifiable intangible assets $ 77
Weighted Average Life (In Years) 18 years
Developed technology  
Acquired Finite-Lived Intangible Assets [Line Items]  
Total identifiable intangible assets $ 60
Weighted Average Life (In Years) 17 years
Trade names and trademarks  
Acquired Finite-Lived Intangible Assets [Line Items]  
Total identifiable intangible assets $ 11
Weighted Average Life (In Years) 10 years