Other Income (Tables)

12 Months Ended

Dec. 31, 2017

Other Income and Expenses [Abstract]

Components of Other Earnings

Other Income (As Restated)

($ in millions)	2017		2016		2015
	As Restated		As Restated
Gain on disposals of ownership interests in business affiliates		$25		$46		$—
Royalty income	11		12		15
Share of net earnings of equity affiliates (See Note 6)	12		8		4
Gain on sale of assets	28		6		4
Income from a legal settlement	18		—		—
Other	56		55		87
Total		$150		$127		$110