Leases (Unaudited) Leases (Tables)

6 Months Ended

Jun. 30, 2019

Leases [Abstract]

Lease, Cost [Table Text Block]

Total lease cost is comprised of the following:

$ in millions	Three Months Ended June 30, 2019		Six Months Ended June 30, 2019
Operating lease cost	$	77	$	159
Variable lease cost	2		4
Short-term lease cost	12		29
Total lease cost	$	91	$	192

Supplemental Balance Sheet Disclosures [Text Block]

Supplemental operating lease balance sheet information consists of the following:

$ in millions	June 30, 2019
Operating lease right-of-use assets	$	1,278
Other current liabilities	245
Operating lease liabilities	1,081
Total operating lease liabilities	$	1,326

Other Supplemental Lease Information [Table Text Block]

Other supplemental operating lease information consists of the following:

$ in millions	Six Months Ended June 30, 2019
Cash paid for amounts included in the measurement of operating lease liabilities	$	153
Right-of-use assets obtained in exchange for new lease liabilities	101
Weighted average remaining lease term	10.3 years
Weighted average discount rate	3.9		%

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

Maturities of operating lease liabilities as of June 30, 2019 are as follows:

$ in millions
Year Ending December 31
2019 (1)	$	137
2020	270
2021	219
2022	183
2023	145
Thereafter	746
Total lease payments	1,700
Less: imputed interest	(374		)
Present value of operating lease liabilities	$	1,326

⁽¹⁾ 

Excludes the six months ended June 30, 2019.

Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]

As of December 31, 2018, future minimum lease payments under long-term non-cancelable operating leases as classified under ASC 840 were as follows:

$ in millions
Year Ending December 31
2019	$	312
2020	270
2021	221
2022	186
2023	152
Thereafter	939
Total minimum lease payments	$	2,080