Revenue from Contracts with Customers

Disaggregation of Revenue

The table below presents our revenue disaggregated by major product category and reportable segment for the year ended December 31, 2019:



	Supply Chain Services			Software Solutions		Prescription Management		Eliminations			Total
North America	$	1,816		$	82	$	246	$	(33	)	$	2,111
Europe	1,513			10		—		(14		)	1,509
APAC & Emerging Markets	361			7		—		—			368
Eliminations	(12		)	—		—		—			(12		)
Total net sales	$	3,678		$	99	$	246	$	(47	)	$	3,976

The table below presents our revenue disaggregated by major product category and reportable segment for the year ended December 29, 2018:



	Supply Chain Services			Software Solutions		Prescription Management		Eliminations			Total
North America	$	1,858		$	83	$	—	$	(2	)	$	1,939
Europe	1,462			11		—		(10		)	1,463
APAC & Emerging Markets	380			7		—		—			387
Eliminations	(11		)	—		—		—			(11		)
Total net sales	$	3,689		$	101	$	—	$	(12	)	$	3,778

The table below presents our revenue recognized under ASC 605 disaggregated by major product category and reportable segment for the year ended December 30, 2017:



	Supply Chain Services			Software Solutions		Prescription Management		Eliminations			Total
North America	$	1,795		$	83	$	—	$	(2	)	$	1,876
Europe	1,359			11		—		3			1,373
APAC & Emerging Markets	342			7		—		—			349
Eliminations	(18		)	—		—		—			(18		)
Total net sales	$	3,478		$	101	$	—	$	1		$	3,580

The following table presents our revenue and gross billings associated with our Net Agency Revenue:



	Years Ended
	December 31, 2019		December 29, 2018		December 30, 2017
Net Agency Revenue	$	18	$	26	$	16
Gross billings from Net Agency Revenue	$	447	$	454	$	402

Contract Balances

The following table presents information about our receivables, contract assets, and contract liabilities from contracts with customers:



	Balance Sheet Location	December 31, 2019		December 29, 2018
Accounts receivable:
Accounts receivable, net		$	426	$	431
Contract liabilities:
Deferred revenue, current	Other current liabilities	$	37	$	18

For the year ended December 31, 2019, deferred revenue recognized from performance obligations completed this period approximates the balance outstanding as of December 29, 2018. The increase in Deferred revenue for the year ended December 31, 2019 compared to the prior year was primarily attributable to increased customer orders in the U.K. due to uncertainty created by Brexit.

Performance Obligations

Estimated future revenues expected to be generated from long-term contracts with unsatisfied performance obligations as of December 31, 2019, was not material.