Subsequent Event (Details) shares in Millions, $ in Millions	9 Months Ended
	Sep. 30, 2016 USD ($) shares
Subsequent Events [Abstract]
Subsequent Event, Date	Oct. 04, 2016
Stock Issued During Period, Shares, Acquisitions | shares	25
Payments to Acquire Businesses	$ 16
Total consideration of mergers and transactions transferred	2,400
Business Combination, Recognized Identifiable - Cash and Equivalents	64
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt	$ 164