Other receivables

3 Months Ended

Mar. 31, 2019

Receivables [Abstract]

Other receivables

Note 8. Other receivables

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

	March 31, 2019			December 31, 2018
Insurance premiums receivable	$	13,766		$	12,452
Reinsurance recoverable on unpaid losses		3,164			3,060
Trade receivables		12,957			12,617
Other		4,188			3,823
Allowances for uncollectible accounts		(365	)		(388	)
	$	33,710		$	31,564

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

	March 31, 2019			December 31, 2018
Trade receivables	$	3,237		$	3,433
Other		354			362
Allowances for uncollectible accounts		(131	)		(129	)
	$	3,460		$	3,666

Trade receivables include unbilled revenue of $569 million and $554 million as of March 31, 2019 and December 31, 2018, respectively, attributable to the regulated utility businesses.