Intangibles Assets, Net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Total annual intangible asset amortization expense
Acquired intangible assets, net of accumulated amortization	$ 27		$ 27		$ 33
Accumulated amortization	112		112		112
Capitalized software (net of accumulated amortization)	75		75		82
Accumulated amortization - capitalized software	160		160		148
Total intangible assets, net	2,104		2,104		2,188
Amortization of Intangible Assets	48	$ 49	96	$ 104
Rexam
Total annual intangible asset amortization expense
Acquired intangible assets, net of accumulated amortization	2,002		2,002		2,073
Accumulated amortization	482		482		$ 399
Amortization of Intangible Assets	$ 40	$ 40	$ 80	$ 84