(In millions)	Business Solutions Division		Retail Division		CompuCom Division			Total
Balance as of December 30, 2017	$	328	$	78	$	445		$	851
Acquisitions		57		—		13			70
Foreign currency rate impact		—		—		(12	)		(12	)
Purchase accounting adjustments		2		—		7			9
Sale of Clearpath Holdings, LLC		—		—		(4	)		(4	)
Balance as of December 29, 2018	$	387	$	78	$	449		$	914

Goodwill in the Business Solutions Division in the table above is net of $349 million of accumulated impairment loss recognized in 2008.

Purchase accounting adjustments primarily relate to goodwill associated with 2017 acquisitions as disclosed in Note 2. These adjustments were made during the respective measurement periods and were based on the receipt of new information about the balances at the time of acquisition. The measurement periods for acquisitions completed in 2017 closed within 2018.

Goodwill of $4 million was allocated to the Clearpath Holdings, LLC business as part of the CompuCom acquisition as disclosed in Note 2, and it was removed following the December 2018 sale of that business.

The Company had $79 million of trade names and $2 million of other indefinite-lived intangible assets as of December 29, 2018, which were all acquired in 2017 and are included in Other intangible assets, net in the Consolidated Balance Sheets.

Definite-lived intangible assets are reviewed periodically to determine whether events and circumstances indicate the carrying amount may not be recoverable or the remaining period of amortization should be revised. In connection with implementing the Comprehensive Business Review, the Company recognized impairment charges associated with favorable leases at closing locations. These impairment charges are presented in Asset impairments in the Consolidated Statements of Operations.

Refer to Note 16 for additional information on fair value measurement of goodwill and other intangible assets.

Definite-lived intangible assets, which are included in Other intangible assets, net in the Consolidated Balance Sheets, are as follows:

	December 29, 2018
(In millions)	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Customer relationships	$	408	$	(84	)	$	324
Technology		19		(9	)		10
Favorable leases		11		(4	)		7
Total	$	438	$	(97	)	$	341

	December 30, 2017
(In millions)	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Customer relationships	$	399	$	(60	)	$	339
Technology		19		(1	)		18
Favorable leases		16		(7	)		9
Total	$	434	$	(68	)	$	366

Definite-lived intangible assets generally are amortized using the straight-line method. The pattern of benefit associated with one customer relationship asset recognized as part of the OfficeMax merger warranted a three-year accelerated declining balance method, and was fully amortized as of December 29, 2018. Favorable leases are amortized using the straight-line method over the lives of the individual leases, including option renewals anticipated in the original valuation. The remaining weighted average amortization periods for customer relationships, technology, and favorable leases are 15 years, 1.5 years, and 17 years, respectively, and 15 years in the aggregate.

Amortization of intangible assets was $31 million in 2018, $9 million in 2017 and $10 million in 2016. Intangible assets amortization expenses are included in the Consolidated Statements of Operations in Selling, general and administrative expenses. Amortization of favorable leases is included in rent expense. Refer to Note 12 for additional information about leases.

(In millions)
2019	$	32
2020		27
2021		24
2022		24
2023		21
Thereafter		213
Total	$	341