Leases (Tables)

6 Months Ended

Jun. 30, 2019

Leases [Abstract]

Supplemental operating lease cash flow information [Table Text Block]

(dollars in millions)	Quarter Ended June 30, 2019			Six Months Ended June 30, 2019
Operating cash flows for the measurement of operating lease liabilities	$	(192	)	$	(337	)
Operating lease right-of-use assets obtained in exchange for operating lease obligations	174			201

Balance Sheet Location, Operating Leases [Table Text Block]

(dollars in millions, except lease term and discount rate)	June 30, 2019
Operating lease right-of-use assets	$	2,740
Accrued liabilities	$	(580	)
Operating lease liabilities	(2,258		)
Total operating lease liabilities	$	(2,838	)

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

	June 30, 2019
Weighted Average Remaining Lease Term (in years)	6.8
Weighted Average Discount Rate	3.6	%

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

(dollars in millions)	Operating 1
2019	$	344
2020	629
2021	543
2022	412
2023	287
Thereafter	878
Total undiscounted lease payments	3,093
Less imputed interest	(255		)
Total discounted lease payments	$	2,838