Intangibles Assets, Net (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Total annual intangible asset amortization expense
Acquired intangible assets, net of accumulated amortization	$ 64		$ 75
Accumulated amortization	173		163
Capitalized software (net of accumulated amortization)	82		84
Accumulated amortization - capitalized software	134		129
Total intangible assets, net	2,432		2,462
Amortization of Intangible Assets	55	$ 41
Rexam
Total annual intangible asset amortization expense
Acquired intangible assets, net of accumulated amortization	2,286		2,303
Accumulated amortization	284		$ 246
Amortization of Intangible Assets	$ 44	$ 32