Other receivables

12 Months Ended

Dec. 31, 2019

Receivables [Abstract]

Other receivables

(8) Other receivables

Other receivables of insurance and other businesses are comprised of the following (in millions).

	December 31,
	2019			2018
Insurance premiums receivable	$	13,379		$	12,452
Reinsurance recoverable on unpaid losses		2,855			3,060
Trade receivables		12,275			12,617
Other		4,327			3,823
Allowances for uncollectible accounts		(418	)		(388	)
	$	32,418		$	31,564

Receivables of our railroad and our utilities and energy businesses are comprised of the following (in millions).

	December 31,
	2019			2018
Trade receivables	$	3,120		$	3,433
Other		388			362
Allowances for uncollectible accounts		(91	)		(129	)
	$	3,417		$	3,666

Trade receivables include unbilled revenue of $638 million and $554 million as of December 31, 2019 and 2018, respectively, attributable to the regulated utility businesses.