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Restructuring (Tables)
6 Months Ended
Jun. 30, 2021
Restructuring and Related Activities [Abstract]  
Charges Related to Restructuring Program Activities by Type of Cost
The following tables summarize the charges related to restructuring program activities by type of cost:
 Three Months Ended June 30, 2021Six Months Ended June 30, 2021
($ in millions)Separation
Costs
Accelerated
Depreciation
OtherTotalSeparation
Costs
Accelerated
Depreciation
OtherTotal
Cost of sales$— $11 $27 $38 $— $21 $44 $65 
Selling, general and administrative— — — — 
Research and development— — — 13 — 13 
Restructuring costs64 — 18 82 293 — 87 380 
$64 $19 $45 $128 $293 $38 $131 $462 
 Three Months Ended June 30, 2020Six Months Ended June 30, 2020
($ in millions)Separation
Costs
Accelerated
Depreciation
OtherTotalSeparation
Costs
Accelerated
Depreciation
OtherTotal
Cost of sales$— $31 $(6)$25 $— $56 $37 $93 
Selling, general and administrative— 11 — 11 — 22 — 22 
Research and development— 31 — 31 — 48 — 48 
Restructuring costs35 — 47 82 82 — 70 152 
$35 $73 $41 $149 $82 $126 $107 $315 
Charges and Spending Relating to Restructuring Activities by Program
The following table summarizes the charges and spending relating to restructuring program activities for the six months ended June 30, 2021:
($ in millions)Separation
Costs
Accelerated
Depreciation
OtherTotal
Restructuring reserves January 1, 2021
$567 $— $19 $586 
Expense293 38 131 462 
(Payments) receipts, net(230)— (157)(387)
Non-cash activity— (38)48 10 
Restructuring reserves June 30, 2021 (1)
$630 $— $41 $671 
(1)The remaining cash outlays are expected to be substantially completed by the end of 2023.