Other Assets (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Other assets
Long-term deferred tax assets	$ 409	$ 443
Long-term pension asset	172	147
Investments in affiliates	257	204
Company and trust-owned life insurance	168	146
Other	144	164
Other Assets	$ 1,150	$ 1,104