Other Assets (Details) - USD ($) $ in Millions	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Other assets
Long-term deferred tax assets	$ 203		$ 237
Long-term pension assets	561		559
Investments in affiliates	282		302
Right-of-use operating lease assets	242	$ 244
Other	402		311
Other Assets	$ 1,690		$ 1,409