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Cash And Cash Equivalents (Tables)

12 Months Ended

Dec. 31, 2018

Cash and cash equivalents

Cash and Cash Equivalents

($ millions)		December 31 2018		December 31 2017
Cash		1 285		1 184
Cash equivalents		936		1 488
		2 221		2 672

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Tabular disclosure of cash and cash equivalents.

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