Intangibles Assets, Net (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Total annual intangible asset amortization expense
Acquired intangible assets, net of accumulated amortization	$ 29		$ 33
Accumulated amortization	109		112
Capitalized software (net of accumulated amortization)	78		82
Accumulated amortization - capitalized software	154		148
Total intangible assets, net	2,137		2,188
Amortization of Intangible Assets	48	$ 55
Rexam
Total annual intangible asset amortization expense
Acquired intangible assets, net of accumulated amortization	2,030		2,073
Accumulated amortization	439		$ 399
Amortization of Intangible Assets	$ 40	$ 44