Related Party Transactions - Payables To Related Parties (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Related Party Transaction [Line Items]
Payables to related parties	$ 18	$ 16
Explorer
Related Party Transaction [Line Items]
Payables to related parties	3	0
LOCAP
Related Party Transaction [Line Items]
Payables to related parties	1	2
LOOP
Related Party Transaction [Line Items]
Payables to related parties	4	3
TAAE
Related Party Transaction [Line Items]
Payables to related parties	3	2
TACE
Related Party Transaction [Line Items]
Payables to related parties	2	4
TAME
Related Party Transaction [Line Items]
Payables to related parties	4	5
Other equity method investees
Related Party Transaction [Line Items]
Payables to related parties	$ 1	$ 0