Intangibles Assets, Net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Total annual intangible asset amortization expense
Acquired intangible assets, net of accumulated amortization	$ 26		$ 26		$ 24
Accumulated amortization	122		122		116
Capitalized software (net of accumulated amortization)	82		82		69
Accumulated amortization - capitalized software	189		189		170
Total intangible assets, net	1,897		1,897		2,002
Amortization expense	45	$ 46	134	$ 142
Rexam
Total annual intangible asset amortization expense
Acquired intangible assets, net of accumulated amortization	1,789		1,789		1,909
Accumulated amortization	677		677		$ 567
Amortization expense	$ 37	$ 38	$ 111	$ 118