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OTHER OPERATING EXPENSE, NET (Tables)
9 Months Ended
Sep. 30, 2021
Other Income and Expenses [Abstract]  
Schedule of other expense
Items included in Other operating expense, net consist of:
Three Months Ended September 30,Nine Months Ended September 30,
(in millions)2021202020212020
Restructuring expense (Note 5)$51 $20 $143 $72 
Merger, acquisition and divestiture expense16 36 58 
Loss on sale— — — 
Asset impairments— — — 17 
Net gain on insurance recovery for property damage(1)(3)(3)(9)
Other income, net(4)(4)(10)(5)
Other operating expense, net$54 $29 $173 $133