Employee Benefit Obligations - Total (Details) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Employee Benefit Obligations
Underfunded defined benefit pension liabilities	$ 897	$ 963
Less current portion	(26)	(25)
Long-term defined benefit pension liabilities	871	938
Retiree medical and other postemployment benefits	217	226
Deferred compensation plans	280	272
Other	61	61
Total non-current employee benefit obligations	1,429	1,497
Ball Corporation
Employee Benefit Obligations
Total non-current employee benefit obligations	$ 346	$ 347