CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenues:
Insurance premiums		$ 2,035	$ 1,850	$ 3,997	$ 3,719
Net investment income		616	644	1,166	807
Investment gains (losses) (Note 2)	[1]	578	(1,142)	635	(1,358)
Non-insurance warranty revenue		359	308	697	609
Operating revenues and other		415	650	1,130	1,632
Total		4,003	2,310	7,625	5,409
Expenses:
Insurance claims and policyholders' benefits		1,546	1,642	3,052	3,067
Amortization of deferred acquisition costs		357	342	716	686
Non-insurance warranty expense		332	285	643	566
Operating expenses and other		656	992	1,570	3,018
Interest		100	123	225	267
Total		2,991	3,384	6,206	7,604
Income (loss) before income tax		1,012	(1,074)	1,419	(2,195)
Income tax (expense) benefit		(219)	228	(333)	305
Net income (loss)		793	(846)	1,086	(1,890)
Amounts attributable to noncontrolling interests		(39)	11	(71)	423
Net income (loss) attributable to Loews Corporation		$ 754	$ (835)	$ 1,015	$ (1,467)
Basic net income (loss) per share (in dollars per share)		$ 2.87	$ (2.96)	$ 3.83	$ (5.16)
Diluted net income (loss) per share (in dollars per share)		$ 2.86	$ (2.96)	$ 3.82	$ (5.16)
Weighted average shares outstanding:
Shares of common stock (in shares)		262,760	281,480	265,060	284,260
Dilutive potential shares of common stock (in shares)		580		490
Total weighted average shares outstanding assuming dilution (in shares)		263,340	281,480	265,550	284,260

[1] Gross investment gains on available-for-sale securities were $51 and $102 for the three months ended June 30, 2021 and 2020 and $109 and $131 for the six months ended June 30, 2021 and 2020. Gross investment losses on available-for-sale securities were $20 and $85 for the three months ended June 30, 2021 and 2020 and $40 and $189 for the six months ended June 30, 2021 and 2020. During the three and six months ended June 30, 2021, $15 of investment gains were recognized due to the change in fair value of non-redeemable preferred stock still held as of June 30, 2021. During the three and six months ended June 30, 2020, $63 of investment gains and $70 of investment losses were recognized due to the change in fair value of non-redeemable preferred stock still held as of June 30, 2020.