Supplemental Cash Flow Information (Tables)

6 Months Ended

Jun. 30, 2021

Supplemental Cash Flow Information [Abstract]

Schedule of supplemental cash flow information from collateralized securities received

($ in millions)	Six months ended June 30,
	2021		2020
Net change in proceeds managed
Net change in short-term investments	$	(583)	$	336
Operating cash flow (used) provided	(583)		336
Net change in cash	2		(8)
Net change in proceeds managed	$	(581)	$	328
Cash flows from operating activities
Net change in liabilities
Liabilities for collateral, beginning of period	$	(914)	$	(1,298)
Liabilities for collateral, end of period	(1,495)		(970)
Operating cash flow provided (used)	$	581	$	(328)