Long-Term Contracted Revenue (Tables)

12 Months Ended

Dec. 31, 2019

Contractors [Abstract]

Schedule of Financing Receivables, Minimum Payments

The following long-term contracted revenue were in existence at December 31, 2019 ($ in millions):

	Lease Revenue (ASC 842)		Contract Revenue (ASC 606)		Total Long-Term Revenue
2020	$	285	$	64	$	349
2021	155		35		190
2022	98		29		127
2023	66		22		88
2024	25		8		33
Thereafter	90		18		108
Total	$	719	$	176	$	895