Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2015

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases

Minimum rental commitments under long-term non-cancelable operating leases as of December 31, 2015 are payable as follows:

$ in millions
Year Ending December 31
2016	$	251
2017	201
2018	135
2019	99
2020	61
Thereafter	92
Total minimum lease payments	$	839