Other Assets (Details) - USD ($) $ in Millions	Jun. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Other assets
Long-term deferred tax assets	$ 189		$ 237
Long-term pension assets	572		559
Investments in affiliates	284		302
Right-of-use operating lease assets	240	$ 244
Company and trust-owned life insurance	177		152
Other	192		159
Other Assets	$ 1,654		$ 1,409