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FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)
 12 Months Ended
Dec. 31, 2021
Fair Value Disclosures [Abstract]  
Carrying Values and Fair Values of Non-Current Financial Assets and Liabilities We present the carrying values and the fair values of noncurrent financial assets and liabilities that qualify as financial instruments, determined under current guidance for disclosures on the fair value of financial instruments, in the following table:
 At Year-End 2021At Year-End 2020
($ in millions)Carrying
Amount		Fair ValueCarrying
Amount		Fair Value
Senior, mezzanine, and other loans$144 $131 $159 $142 
Total noncurrent financial assets$144 $131 $159 $142 
Senior Notes$(8,009)$(8,480)$(8,031)$(8,941)
Credit Facility(1,050)(1,050)(900)(900)
Other long-term debt(135)(140)(126)(128)
Other noncurrent liabilities(414)(414)(426)(426)
Total noncurrent financial liabilities$(9,608)$(10,084)$(9,483)$(10,395)