Acquisitions and Dispositions - Net assets acquired (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended	12 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Dec. 31, 2016	Jun. 30, 2016
Assets and Liabilities Acquired
Goodwill	$ 4,858		$ 5,095	$ 5,095
Ball Corporation
Assets and Liabilities Acquired
Goodwill	3
Rexam
Acquisition adjustments to initial accounting
Increase (decrease) to intangible assets	590
Increase (decrease) to investments in affiliates	31
Increase (decrease) to goodwill	(384)
Increase (decrease) to long-term deferred tax liabilities	221
Amortization recorded as a result of changes to the initial accounting of intangible assets in business combination	23	$ 8		$ 15
Depreciation recorded as a result of changes to initial accounting of fixed assets in business combination	$ 35		$ 24
Catch up depreciation		$ 11
Assets and Liabilities Acquired
Cash					$ 450
Receivables, net					778
Inventories, net					782
Other current assets					165
Assets held for sale (sold to Ardagh on June 30, 2016)					911
Total current assets					3,086
Property, plant and equipment					2,301
Goodwill					3,415
Intangible assets					2,478
Restricted cash					174
Other Assets					490
Total assets acquired					11,944
Short-term debt and current portion of long-term debt					2,792
Accounts payable					858
Accrued employee costs					135
Liabilities held for sale					7
Other current liabilities					373
Total current liabilities					4,165
Long term debt					28
Employee benefit obligations					508
Deferred taxes and other liabilities					993
Total liabilities assumed					(5,694)
Net assets acquired					6,250
Noncontrolling interests					(90)
Aggregate value of consideration paid					$ 6,160