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Investments (Tables)

12 Months Ended

Dec. 31, 2016

Investments, Debt and Equity Securities [Abstract]

Schedule of Investments

The following table presents the details of our investments:

	December 31,
	2016				2015
	(in millions)
Trading securities	$	228			$	189
Available-for-sale investment securities	17				12
Equity method investments	124				72
Cost method investments	144				132

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