Retroactive reinsurance contracts (Tables)

9 Months Ended

Sep. 30, 2021

Insurance [Abstract]

Reconciliation of changes in retroactive reinsurance claim liabilities and deferred charges

Reconciliations of the changes in estimated liabilities for retroactive reinsurance unpaid losses and loss adjustment expenses (“claim liabilities”) and related deferred charges reinsurance assumed for each of the nine-month periods ending September 30, 2021 and 2020 follow (in millions).

	2021						2020
	Unpaid losses and loss adjustment expenses			Deferred charges reinsurance assumed			Unpaid losses and loss adjustment expenses			Deferred charges reinsurance assumed
Balances at beginning of year	$	40,966		$	(12,441	)	$	42,441		$	(13,747	)
Incurred losses and loss adjustment expenses:
Current year contracts		82			—			—			—
Prior years’ contracts		(9	)		709			131			735
Total		73			709			131			735
Paid losses and loss adjustment expenses		(1,318	)		—			(786	)		—
Balances at September 30	$	39,721		$	(11,732	)	$	41,786		$	(13,012	)
Incurred losses and loss adjustment expenses, net of deferred charges	$	782					$	866