Revenue from Contracts With Customers (Tables)

12 Months Ended

Dec. 31, 2021

Revenue from Contract with Customer

Schedule of the disaggregation of revenue by timing of transfer of control

	($ in millions)
Years Ended December 31,	Point in Time		Over Time		Total
2021	$	2,459	$	11,352	$	13,811
2020		2,223		9,558		11,781
2019		2,220		9,254		11,474

Schedule of balances of contract liabilities

	Contract		Contract
	Liabilities		Liabilities
($ in millions)	(Current)		(Noncurrent)
Balance at December 31, 2019	$	87	$	9
Increase (decrease)		21		20
Balance at December 31, 2020		108		29
Increase (decrease)		164		9
Balance at December 31, 2021	$	272	$	38

Schedule of transaction price allocated to remaining performance obligations

($ in millions)	Next Twelve Months		Thereafter		Total
Sales expected to be recognized on multi-year contracts in place as of December 31, 2021	$	1,210	$	1,136	$	2,346