Other Income (Tables)

12 Months Ended

Dec. 31, 2018

Other Income and Expenses [Abstract]

Components of Other Earnings

($ in millions)	2018		2017		2016
Gain on sale of assets(1)		$33		$28		$6
Royalty income	10		11		12
Share of net earnings of equity affiliates (See Note 6)	16		12		8
Gain on disposals of ownership interests in business affiliates	—		25		46
Income from a legal settlement	—		18		—
Other	55		56		55
Total		$114		$150		$127