Other Financial Data

Consolidated Statements of Income Information

Other Income (Expense)

Other income (expense) consists of the following (in millions):



Years ended December 31	2017			2016			2015
Foreign currency remeasurement gain (loss)	$	(37	)	$	(2	)	$	30
Net gain (loss) on disposal of businesses	(16		)	39			82
Equity earnings	12			13			13
Income (loss) on financial instruments	2			(14		)	(24		)
Other	—			—			(1		)
Total	$	(39	)	$	36		$	100

Consolidated Statements of Financial Position Information

Allowance for Doubtful Accounts

An analysis of the allowance for doubtful accounts is as follows (in millions):



	2017			2016			2015
Balance at January 1	$	56		$	58		$	72
Provision charged to Other general expenses	18			10			12
Accounts written off, net of recoveries	(18		)	(15		)	(32		)
Foreign currency translation	3			3			6
Balance at December 31	$	59		$	56		$	58

Other Current Assets

The components of Other current assets are as follows (in millions):



As of December 31	2017		2016
Taxes receivable	$	114	$	100
Prepaid expenses	126		102
Receivables from the Divested Business ⁽¹⁾	28		—
Other	21		45
Total	$	289	$	247


(1)	Refer to Note 4 “Discontinued Operations” for additional information.

Fixed Assets, net

The components of Fixed assets, net are as follows (in millions):



As of December 31	2017		2016
Software	$	680	$	677
Leasehold improvements	349		369
Computer equipment	295		258
Furniture, fixtures and equipment	240		252
Construction in progress	79		75
Other	90		115
Fixed assets, gross	1,733		1,746
Less: Accumulated depreciation	1,169		1,196
Fixed assets, net	$	564	$	550

Depreciation expense, which includes software amortization, was $187 million, $162 million, and $164 million for the years ended December 31, 2017, 2016, and 2015, respectively.

Other Non-Current Assets

The components of Other non-current assets are as follows (in millions):



As of December 31	2017		2016
Investments	$	57	$	119
Taxes receivable	84		82
Other	166		159
Total	$	307	$	360

Other Current Liabilities

The components of Other current liabilities are as follows (in millions):



As of December 31	2017		2016
Deferred revenue	$	311	$	199
Taxes payable ⁽¹⁾	139		77
Other	420		380
Total	$	870	$	656


(1)	Includes a provisional estimate of $42 million for the current portion of the Transition Tax. Refer to Note 10 “Income Taxes” for further information.

Other Non-Current Liabilities

The components of Other non-current liabilities are as follows (in millions):



	2017		2016
Taxes payable ⁽¹⁾	$	529	$	288
Leases	153		136
Compensation and benefits	67		56
Deferred revenue	49		49
Other	304		190
Total	$	1,102	$	719


(1)	Includes a provisional estimate of $222 million for the Transition Tax. Refer to Note 10 “Income Taxes” for further information.