Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2016	Sep. 30, 2017	Dec. 31, 2015	Sep. 30, 2015
Prepaid expenses and other current assets:
Prepaid expenses	$ 61		$ 52	$ 50
Value added taxes	42		195	224
Other	131		119	168
Prepaid expenses and other current assets	234		$ 366	$ 442
Vitro Acquisition
Prepaid expenses and other current assets:
Amount of value added tax remitted		$ 6
Receivable collected	$ 127