Leases (Tables)

9 Months Ended

Sep. 30, 2019

Leases [Abstract]

Supplemental operating lease cash flow information [Table Text Block]

(dollars in millions)	Quarter Ended September 30, 2019			Nine Months Ended September 30, 2019
Operating cash flows for the measurement of operating lease liabilities	$	(223	)	$	(560	)
Operating lease right-of-use assets obtained in exchange for operating lease obligations	38			238

Balance Sheet Location, Operating Leases [Table Text Block]

(dollars in millions, except lease term and discount rate)	September 30, 2019
Operating lease right-of-use assets	$	2,556
Accrued liabilities	$	(546	)
Operating lease liabilities	(2,105		)
Total operating lease liabilities	$	(2,651	)

Supplemental Balance Sheet Information, Operating Leases [Table Text Block]

	September 30, 2019
Weighted Average Remaining Lease Term (in years)	6.9
Weighted Average Discount Rate	3.6	%

Lessee, Operating Lease, Liability, Maturity [Table Text Block]

(dollars in millions)	Operating 1
2019	$	186
2020	695
2021	600
2022	473
2023	320
Thereafter	1,005
Total undiscounted lease payments	3,279
Less imputed interest	(628		)
Total discounted lease payments	$	2,651