Stock-Based Compensation Programs (Details) $ / shares in Units, $ in Millions		1 Months Ended			3 Months Ended	6 Months Ended		12 Months Ended
	Jun. 30, 2016 USD ($) installment	Jun. 30, 2016 USD ($) installment	Jan. 31, 2016 shares	Feb. 28, 2015	Mar. 31, 2015 shares	Jun. 30, 2016 installment $ / shares	Jun. 30, 2015	Dec. 31, 2015 $ / shares
Stock option and SSARs
Stock-Based Compensation Programs
Number of equal installments commencing one year from the date of grant | installment	4	4				4
Vesting period						1 year
Expiration period of options						10 years
Granted (in shares) | shares			1,000,000
Weighted average fair value at grant date (in dollars per share) | $ / shares						$ 18.58		$ 14.20
Weighted average assumptions used in estimation of fair values of options
Expected dividend yield (as a percent)			0.79%	0.79%
Expected stock price volatility (as a percent)			29.25%	22.11%
Risk-free interest rate (as a percent)			1.57%	1.39%
Expected life of options			5 years 11 months 9 days	5 years 10 months 6 days
PCEQs
Stock-Based Compensation Programs
Vesting period						3 years
Granted (in shares) | shares			118,755		116,559
PCEQs | Minimum
Weighted average assumptions used in estimation of fair values of options
Vest range of participant's assigned award opportunity (as a percent)						0.00%	0.00%
PCEQs | Maximum
Weighted average assumptions used in estimation of fair values of options
Vest range of participant's assigned award opportunity (as a percent)						200.00%	200.00%
Rexam
Weighted average assumptions used in estimation of fair values of options
Cash paid to settle awards vested through date of acquisition that was included in consideration paid for the acquisition	$ 21
Share based compensation expense		$ 58
Estimated future share based compensation expense relating to employees to be terminated after transition period	$ 18