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Investments (Tables)

3 Months Ended

Mar. 31, 2017

Investments, Debt and Equity Securities [Abstract]

Schedule of Investments

The following table presents the details of our investments:

	March 31, 2017				December 31, 2016
	(in millions)
Trading securities	$	203			$	228
Available-for-sale investment securities	17				17
Equity method investments	128				124
Cost method investments	145				144

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