Strategic Investments (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Schedule of Investments [Line Items]
Other Nonoperating Income (Expense)	$ 76	$ 4	$ 78	$ 10
Equity Method Investments	208		208		$ 265
Cost Method Investments	42		42		20
Available-for-sale Securities	30		30		20
Notes Receivable From Portfolio Companies	44		44		42
Investments	324		$ 324		$ 347
investment impairment [Member]
Schedule of Investments [Line Items]
Other Nonoperating Income (Expense)	$ 53