Employee Benefit Obligations - Total (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Employee Benefit Obligations
Underfunded defined benefit pension liabilities	$ 969	$ 963
Less current portion	(21)	(25)
Long-term defined benefit pension liabilities	948	938
Retiree medical and other postemployment benefits	219	226
Deferred compensation plans	261	272
Other	59	61
Total non-current employee benefit obligations	1,487	1,497
Ball Corporation
Employee Benefit Obligations
Total non-current employee benefit obligations	$ 331	$ 347