Discontinued Operations - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Aug. 01, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Long-term debt issued	$ 1,726,750,000			$ 1,700,000,000
Non Recurring [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Non-recurring Spin-Off related costs totaled	63,000,000	18,000,000	7,000,000
Paragon Offshore [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Aggregate principal amount of senior notes	1,080,000,000
Number of tranches	2
Senior secured term credit agreement, Amount	650,000,000
Senior secured term credit agreement, Description	Interest rate of LIBOR plus 2.75%, subject to a LIBOR floor of 1%, which has an initial term of seven years.
Interest rate initial term	7 years
Interest expense related to related to Paragon issued debt to discontinued operations	4,000,000	0	0
Paragon Offshore [Member] | 6.75% Senior Notes Due 2022 [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Aggregate principal amount of senior notes	500,000,000
Senior Notes, Percentage	6.75%
Senior Notes, Maturity year	2022
Paragon Offshore [Member] | 7.25% Senior Notes Due 2024 [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Aggregate principal amount of senior notes	580,000,000
Senior Notes, Percentage	7.25%
Senior Notes, Maturity year	2024
FDR Holdings, Ltd. [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Goodwill				$ 15,000,000