Acquisitions (Tables)

12 Months Ended

Dec. 31, 2018

Business Combinations [Abstract]

Future amortization expense

Amortization expense of intangible assets for the next five years and thereafter
($ in millions)	InfoArmor		SquareTrade
2019	$	50	$	72
2020	44		62
2021	38		52
2022	31		42
2023	25		34
Thereafter	56		50
Total amortization	$	244	$	312