Schedule I - Condensed Financial Information of Registrant - Parent Company Only, Statements of Income and Comprehensive Income (Parenthetical) (Detail) (Loews Corporation [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Loews Corporation [Member]
Condensed Financial Statements, Captions [Line Items]
Cash dividends paid to the Company by affiliates	$ 782	$ 736	$ 676