Intangibles Assets, Net (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2016	Dec. 31, 2017
Total annual intangible asset amortization expense
Acquired intangible assets, net of accumulated amortization	$ 40			$ 40			$ 75
Accumulated amortization	133			133			163
Capitalized software (net of accumulated amortization)	84			84			84
Accumulated amortization - capitalized software	135			135			129
Total intangible assets, net	2,305			2,305			2,462
Amortization of Intangible Assets	49	$ 76		104	$ 117
Rexam
Total annual intangible asset amortization expense
Acquired intangible assets, net of accumulated amortization	2,181			2,181			2,303
Accumulated amortization	323			323			$ 246
Amortization of Intangible Assets	$ 40	51		$ 84	$ 83
Amortization recorded as a result of changes to the initial accounting of intangible assets in business combination		$ 23	$ 8			$ 15