CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME
Net income	$ 191	[1]	$ 229	[1]	$ 250	[1]
Other comprehensive income
Reclassification to net income of gains and losses on cash flow hedges (Note 10)					14	[1]
Other comprehensive income					14	[1]
Total comprehensive income	191	[1]	229	[1]	264	[1]
Comprehensive income attributable to non-controlling interests	36	[1]	37	[1]	34	[1]
Comprehensive income attributable to controlling interests	$ 155	[1]	$ 192	[1]	$ 230	[1]

[1] (a) Recast as discussed in Note 2 and Note 6.