Consolidated Statements of Income - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues:
Insurance premiums	$ 7,428	$ 7,312	$ 6,988
Net investment income	2,355	1,817	2,182
Investment gains (losses):
Other-than-temporary impairment losses	(44)	(21)	(14)
Other net investment gains (losses)	93	(36)	136
Total investment gains (losses)	49	(57)	122
Non-insurance warranty revenue	1,161	1,007	390
Operating revenues and other	3,938	3,987	4,053
Total	14,931	14,066	13,735
Expenses:
Insurance claims and policyholders' benefits	5,806	5,572	5,310
Amortization of deferred acquisition costs	1,383	1,335	1,233
Non-insurance warranty expense	1,082	923	299
Operating expenses and other	4,950	4,828	4,665
Interest	591	574	646
Total	13,812	13,232	12,153
Income before income tax	1,119	834	1,582
Income tax expense	(248)	(128)	(170)
Net income	871	706	1,412
Amounts attributable to noncontrolling interests	61	(70)	(248)
Net income attributable to Loews Corporation	$ 932	$ 636	$ 1,164
Basic net income per common share	$ 3.08	$ 1.99	$ 3.46
Diluted net income per common share	$ 3.07	$ 1.99	$ 3.45
Basic weighted average number of shares outstanding	302,700	319,060	336,610
Diluted weighted average number of shares outstanding	303,350	319,930	337,500