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Leases (Tables)
12 Months Ended
Dec. 31, 2019
Leases [Abstract]  
Schedule of Lease Related Assets and Liabilities
Operating lease amounts included on the Consolidated Balance Sheet were as follows:

December 31, 2019
($ in millions)
AssetsClassification
ROU assetsOther assets$539  
Liabilities
Current lease liabilitiesOther current liabilities$97  
Non-current lease liabilitiesOther liabilities441  
Total lease liabilities$538  
Lease, Cost
The components of total lease expense, primarily included in “Purchased services and rents,” were as follows:
December 31, 2019
($ in millions)
Operating lease expense$114  
Variable lease expense57  
Short-term lease expense 
Total lease expense$176  
Other information related to operating leases was as follows:
December 31, 2019
Weighted-average remaining lease term (years) on operating leases8.25
Weighted-average discount rates on operating leases3.52 %
Lessee, Operating Lease, Liability, Maturity
Future minimum lease payments under non-cancellable operating leases were as follows:
December 31, 2019
($ in millions)
2020$110  
2021104  
202279  
202370  
202461  
2025 and subsequent years206  
Total lease payments630  
Less: Interest92  
Present value of lease liabilities$538  
Schedule of Future Minimum Rental Payments for Operating Leases
Undiscounted future minimum lease payments under non-cancellable operating leases accounted for under ASC 840 “Leases” were as follows:
December 31, 2018
($ in millions)
2019  $101  
2020  95  
2021  88  
2022  75  
2023  69  
2024 and subsequent years267  
Total$695  
Schedule of Rent Expense
Operating lease expense accounted for under ASC 840 “Leases” was as follows:
 
 20182017
 ($ in millions)
Minimum rents$102  $96  
Contingent rents102  54  
Total$204  $150