Other Financial Data

Consolidated Statements of Income Information

Other Income (Expense)

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



	Years ended December 31
	2018			2017			2016
Foreign currency remeasurement	$	25		$	(37	)	$	(2	)
Disposal of business	(6		)	(16		)	39
Pension and other postretirement	1			(86		)	(173		)
Equity earnings	4			12			13
Financial instruments	(49		)	2			(14		)
Total	$	(25	)	$	(125	)	$	(137	)

Consolidated Statements of Financial Position Information

Allowance for Doubtful Accounts

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



	2018			2017			2016
Balance at January 1	$	59		$	56		$	58
Provision charged to Other general expenses	24			18			10
Accounts written off, net of recoveries	(25		)	(18		)	(15		)
Foreign currency translation	4			3			3
Balance at December 31	$	62		$	59		$	56

Other Current Assets

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



As of December 31	2018		2017
Costs to fulfill contracts with customers ⁽¹⁾	$	329	$	—
Taxes receivable	113		114
Prepaid expenses	97		126
Receivables from the Divested Business ⁽²⁾	12		28
Other	67		21
Total	$	618	$	289


(1)	Refer to Note 3 “Revenue from Contracts with Customers” for further information.


(2)	Refer to Note 5 “Discontinued Operations” for further information.

Fixed Assets, net

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



As of December 31	2018		2017
Software	$	693	$	680
Leasehold improvements	334		349
Computer equipment	279		295
Furniture, fixtures and equipment	228		240
Construction in progress	154		79
Other	45		90
Fixed assets, gross	1,733		1,733
Less: Accumulated depreciation	1,145		1,169
Fixed assets, net	$	588	$	564

Depreciation expense, which includes software amortization, was $176 million, $187 million, and $162 million for the years ended December 31, 2018, 2017, and 2016, respectively.

Other Non-Current Assets

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



As of December 31	2018		2017
Costs to obtain contracts with customers ⁽¹⁾	$	156	$	—
Investments	54		57
Taxes receivable	100		84
Other	138		166
Total	$	448	$	307

(1) Refer to Note 3 “Revenue from Contracts with Customers” for further information.

Other Current Liabilities

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



As of December 31	2018		2017
Deferred revenue ⁽¹⁾	$	251	$	311
Taxes payable ⁽²⁾	83		139
Other	602		420
Total	$	936	$	870


(1)	During the twelve months ended December 31, 2018, $487 million was recognized in the Consolidated Statements of Income.


(2)	Includes $42 million for the current portion of the Transition Tax as of December 31, 2017. Refer to Note 11 “Income Taxes” for further information on the Transition Tax.

Other Non-Current Liabilities

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



As of December 31	2018		2017
Taxes payable ⁽¹⁾	$	585	$	529
Leases	169		153
Compensation and benefits	56		67
Deferred revenue	65		49
Other	222		304
Total	$	1,097	$	1,102


(1)	Includes $240 million and $222 million for the non-current portion of the Transition Tax, as of December 31, 2018 and December 31, 2017, respectively. Refer to Note 11 “Income Taxes” for further information on the Transition Tax.