Noncurrent Other Liabilities (Tables)

12 Months Ended

Dec. 31, 2014

Other Liabilities, Noncurrent [Abstract]

Schedule of Noncurrent Other Liabilities

	As of December 31,
	2014	2013
	(In $ millions)
Asset retirement obligations	28	18
Deferred proceeds	47	53
Deferred revenue	21	28
Derivatives (Note 22)	10	3
Environmental (Note 16)	63	67
Income taxes payable	13	20
Insurance	51	50
Restructuring (Note 18)	—	2
Other	50	46
Total	283	287

Schedule of Changes in Asset Retirement Obligations

Changes in asset retirement obligations are as follows:

	Year Ended December 31,
	2014		2013		2012
	(In $ millions)
Balance at beginning of year	47		64		64
Additions(1)	4		5		3
Accretion	1		2		3
Payments	(8	)	(23	)	(12	)
Revisions to cash flow estimates(2)	(7	)	(2	)	5
Exchange rate changes	—		1		1
Balance at end of year	37		47		64

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⁽¹⁾  Primarily relates to sites which management no longer considers to have an indeterminate life.

⁽²⁾  Primarily relates to revisions to the estimated cost and timing of future obligations.