Accounts Receivable, Net (Tables)

6 Months Ended

Jun. 30, 2019

Receivables [Abstract]

Accounts Receivable, Net

(In millions)	June 30, 2019		December 31, 2018
Insurance customer receivables	$	2,144	$	1,888
Noninsurance customer receivables		5,121		4,988
Pharmaceutical manufacturers receivable(1)		4,019		3,321
Other receivables		416		276
Total accounts receivable, net	$	11,700	$	10,473