Acquisitions and Divestitures - Additional Information (Detail) (USD $) In Millions, unless otherwise specified		1 Months Ended	3 Months Ended						3 Months Ended	6 Months Ended		3 Months Ended
	Jun. 30, 2014 Hotel	Jul. 31, 2014 Subsequent Event [Member]	Mar. 31, 2014 Bluegrass Project [Member]	Mar. 31, 2014 Bluegrass Project [Member] Other Operating Expenses [Member]	Mar. 31, 2014 Universal Orlando, Florida [Member] Guest_Room	Jul. 31, 2014 Loews Chicago O'Hare Hotel [Member] Subsequent Event [Member] Guest_Room	Jul. 31, 2014 Loews Minneapolis Hotel [Member] Subsequent Event [Member] Guest_Room	Jul. 31, 2014 Loews Chicago Hotel [Member] Subsequent Event [Member] Guest_Room	Jun. 30, 2014 HighMount [Member]	Jun. 30, 2014 HighMount [Member]	Jun. 30, 2014 CAC [Member]	Mar. 31, 2014 Boardwalk Pipeline Partners, LP [Member] Bluegrass Project [Member]
Business Acquisition and Divestitures [Line Items]
Percentage of coinsurance agreement											100.00%
Impairment charge									$ 259
Impairment charge, after tax									167	167	214
Previous period capitalized costs recorded as charge in present period in other operating expenses				94								10
Previous period capitalized costs recorded as charge in present period in other operating expenses, net of tax and noncontrolling interest			55
Number of hotel properties acquired	3
Number of guestroom in hotel					1,800	556	255	400
Purchase price		$ 190