Business Segments - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2014 Segment
Segment Reporting Information [Line Items]
Number of offshore drilling rigs	38
Number of countries where drilling rigs are located	9
Number of Mid-water rigs to be retired and scrapped	6
Number of rigs under construction	4
Miles of natural gas and NGL pipeline	14,625
Number of states having natural gas storage facilities	4
Total number of hotels owned and/or operated	21
United States [Member]
Segment Reporting Information [Line Items]
Number of hotels	20
Canada [Member]
Segment Reporting Information [Line Items]
Number of hotels	1
CNA Commercial [Member] | Core Operations [Member]
Segment Reporting Information [Line Items]
Number of CNA segments	4
Diamond Offshore [Member]
Segment Reporting Information [Line Items]
Number of rigs under construction	1