Consolidated Condensed Statements of Equity - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Common Stock Held in Treasury [Member]	Noncontrolling Interests [Member]
Beginning Balance at Dec. 31, 2015	$ 22,810	$ 3	$ 3,184	$ 14,731	$ (357)		$ 5,249
Net income	716			654			62
Other comprehensive income	153				134		19
Dividends paid ($0.25 per share)	(218)			(84)
Dividends paid							(134)
Purchase of Boardwalk Pipeline common units	(9)		3				(12)
Purchases of Loews treasury stock	(134)					$ (134)
Retirement of treasury stock			(32)	(102)		134
Stock-based compensation	47		45				2
Other	(4)		(13)	(3)			12
Ending Balance at Dec. 31, 2016	23,361	3	3,187	15,196	(223)		5,198
Net income	1,412			1,164			248
Other comprehensive income	218				197		21
Dividends paid ($0.25 per share)	(223)			(84)
Dividends paid							(139)
Purchases of Loews treasury stock	(237)					(237)
Retirement of treasury stock	1		(41)	(175)		217
Stock-based compensation	35		2				33
Other	(1)		3	(5)			1
Ending Balance at Dec. 31, 2017	24,566	3	3,151	16,096	(26)	(20)	5,362
Cumulative effect adjustment from changes in accounting standards at Dec. 31, 2017	(91)			(43)	(28)		(20)
Balance, as adjusted at Dec. 31, 2017	24,475	3	3,151	16,053	(54)	(20)	5,342
Net income	706			636			70
Other comprehensive income	(892)				(797)		(95)
Dividends paid ($0.25 per share)	(201)			(80)
Dividends paid							(121)
Purchase of Boardwalk Pipeline common units	(1,718)		658		(29)		(2,347)
Purchases of Loews treasury stock	(1,011)					(1,011)
Retirement of treasury stock			(195)	(831)		1,026
Stock-based compensation	31		19				12
Other	(4)		(6)	(5)			7
Ending Balance at Dec. 31, 2018	$ 21,386	$ 3	$ 3,627	$ 15,773	$ (880)	$ (5)	$ 2,868