Other Intangibles

3 Months Ended

Mar. 31, 2022

(6) Other Intangibles:

The components of other intangibles as of March 31, 2022 was follows:



	March 31, 2022						December 31, 2021
	Gross Carrying		Accumulated		Net Carrying		Gross Carrying		Accumulated		Net Carrying
($ in millions)	Amount		Amortization		Amount		Amount		Amortization		Amount

Intangibles:
Customer Relationships - Business	$	800	$	(67)	$	733	$	800	$	(48)	$	752
Customer Relationships - Wholesale		3,491		(200)		3,291		3,491		(146)		3,345
Trademarks & Tradenames		150		(27)		123		150		(20)		130
Total other intangibles	$	4,441	$	(294)	$	4,147	$	4,441	$	(214)	$	4,227

Amortization expense was as follows:


	Successor		Predecessor
	For the three months ended March 31,		For the three months ended March 31,
($ in millions)	2022		2021

Amortization expense	$	80	$	79

Following our emergence from bankruptcy, we amortize our intangible assets on a straight-line basis, over the assigned useful lives of 16 years for our wholesale customer relationships, 11 years for our business customer relationships, and 5 years for our trademarks and tradenames.

For the Predecessor, amortization expense was primarily for our customer base acquired as a result of our acquisitions in 2010, 2014, and 2016 with each based on a useful life of 8 to 12 years and amortized on an accelerated method. Our trade name was an indefinite-lived intangible asset that was not subject to amortization.