Intangibles Assets, Net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Total annual intangible asset amortization expense
Acquired intangible assets, net of accumulated amortization	$ 20		$ 20		$ 24
Accumulated amortization	117		117		116
Capitalized software (net of accumulated amortization)	66		66		69
Accumulated amortization - capitalized software	182		182		170
Total intangible assets, net	1,902		1,902		2,002
Amortization expense	44	$ 48	89	$ 96
Rexam
Total annual intangible asset amortization expense
Acquired intangible assets, net of accumulated amortization	1,816		1,816		1,909
Accumulated amortization	636		636		$ 567
Amortization expense	$ 37	$ 40	$ 74	$ 80