Goodwill and Other Intangible Assets - Other Intangible Assets Amortization Expense Table (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	$ 229	$ 229
Accumulated amortization	(59)	(41)
Net carrying amount	170	188
Amortization expense	7	6
Offshore Platform Leases [Member]
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	60	60
Accumulated amortization	(50)	(36)
Net carrying amount	10	24
Amortization expense	3	3
Customer Contracts [Member]
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	169	169
Accumulated amortization	(9)	(5)
Net carrying amount	160	164
Amortization expense	$ 4	$ 3