Goodwill And Other Intangibles (Tables)

9 Months Ended

Sep. 30, 2018

Goodwill And Other Intangibles [Abstract]

Components Of Other Intangibles

	September 30, 2018						December 31, 2017
	Gross Carrying		Accumulated		Net Carrying		Gross Carrying		Accumulated		Net Carrying
($ in millions)	Amount		Amortization		Amount		Amount		Amortization		Amount
Other Intangibles:
Customer base	$	5,188	$	(3,721)	$	1,467	$	5,188	$	(3,294)	$	1,894
Trade name		122		-		122		122		-		122
Royalty agreement		72		(35)		37		72		(25)		47
Total other intangibles	$	5,382	$	(3,756)	$	1,626	$	5,382	$	(3,319)	$	2,063

Amortization Expense

	For the three months ended September 30,				For the nine months ended September 30,
($ in millions)	2018		2017		2018		2017
Amortization expense	$	134	$	163	$	437	$	539