Other receivables

6 Months Ended

Jun. 30, 2019

Receivables [Abstract]

Other receivables

Note 8. Other receivables

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

	June 30, 2019			December 31, 2018
Insurance premiums receivable	$	13,762		$	12,452
Reinsurance recoverable on unpaid losses		3,149			3,060
Trade receivables		13,180			12,617
Other		4,224			3,823
Allowances for uncollectible accounts		(374	)		(388	)
	$	33,941		$	31,564

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

	June 30, 2019			December 31, 2018
Trade receivables	$	3,448		$	3,433
Other		320			362
Allowances for uncollectible accounts		(127	)		(129	)
	$	3,641		$	3,666

Trade receivables include unbilled revenue of $718 million and $554 million as of June 30, 2019 and December 31, 2018, respectively, attributable to the regulated utility businesses.