Investments in Affiliates Significant Affiliates Financial Statements (Unaudited) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Equity Method Investments and Joint Ventures [Abstract]
Current assets	$ 238	$ 205
Non-current assets	175	166
Total assets	413	371
Current liabilities	148	125
Non-current liabilities	62	67
Shareholders' equity	203	179
Total liabilities and shareholders' equity	413	371
Net sales	633	557	$ 624
Gross profit	159	139	143
Net income	$ 77	$ 38	$ 41