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Leases (Tables)
 12 Months Ended
Dec. 31, 2022
Leases [Abstract]  
Lease, Cost [Table Text Block] Total lease cost is comprised of the following:
Year Ended December 31
$ in millions202220212020
Operating lease cost$332 $315 $320 
Variable lease cost35 31 28 
Short-term lease cost51 80 93 
Total lease cost$418 $426 $441 
Supplemental Balance Sheet Disclosures [Text Block] Supplemental operating lease balance sheet information consists of the following:
Year Ended December 31
$ in millions20222021
Operating lease right-of-use assets$1,811 $1,655 
Other current liabilities299 284 
Operating lease liabilities1,824 1,590 
Total operating lease liabilities$2,123 $1,874 
Other Supplemental Lease Information [Table Text Block] Other supplemental operating lease information consists of the following:
Year Ended December 31
$ in millions20222021
Cash paid for amounts included in the measurement of operating lease liabilities$316 $306 
Right-of-use assets obtained in exchange for new lease liabilities438 394 
Weighted average remaining lease term11.2 years11.3 years
Weighted average discount rate3.4 %3.1 %
Lessee, Operating Lease, Liability, Maturity [Table Text Block] Maturities of operating lease liabilities as of December 31, 2022 are as follows:
$ in millions
Year Ending December 31
2023$351 
2024320 
2025279 
2026238 
2027188 
Thereafter1,263 
Total lease payments2,639 
Less: imputed interest(516)
Present value of operating lease liabilities$2,123