Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2019

Commitments And Contingencies Disclosure [Abstract]

Schedule of Remaining Purchase Obligations

As of March 31, 2019, our remaining obligation pursuant to these arrangements was expected to be incurred as follows:

($ in millions)	Purchase Obligations
Year
2019 (remaining)	$	119
2020		162
2021		84
2022		56
2023		52
Thereafter		54
Total	$	527