Equity Method Investments Equity Method Investments Table (Details) - Reportable Subsegments [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Graphic Packaging LLC [Member]
Schedule of Equity Method Investments [Line Items]
Current assets	$ 1,757
Noncurrent assets	5,292
Current liabilities	1,148
Noncurrent liabilities	3,156
Net sales	6,023
Gross profit	946
Income from continuing operations	336
Net income	337
Ilim Holding [Member]
Schedule of Equity Method Investments [Line Items]
Current assets	981	$ 689
Noncurrent assets	1,710	1,696
Current liabilities	545	1,039
Noncurrent liabilities	1,470	972
Noncontrolling interests	11	6
Net sales	2,713	2,150	$ 1,927
Gross profit	1,549	1,047	957
Income from continuing operations	592	379	419
Net income	$ 571	$ 362	$ 391