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Acquisitions - Others (Details) € in Millions, shares in Millions, $ in Millions, £ in Billions					1 Months Ended							2 Months Ended	3 Months Ended		6 Months Ended
	Jul. 01, 2016 USD ($)	Jun. 30, 2016 GBP (£)	Jun. 30, 2016 USD ($)	Feb. 19, 2015 USD ($)	Jul. 31, 2016 USD ($)	Jun. 30, 2016 EUR (€)	Jun. 30, 2016 GBP (£)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Jan. 31, 2016 USD ($)	Feb. 28, 2015 USD ($)	Nov. 30, 2015 USD ($) shares	Mar. 31, 2016 EUR (€)	Mar. 31, 2016 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2015 EUR (€)	Dec. 31, 2015 GBP (£)	Dec. 31, 2015 USD ($)	May 31, 2015 USD ($)	Feb. 28, 2015 GBP (£)	Feb. 28, 2015 USD ($)	Feb. 19, 2015 GBP (£)	Feb. 19, 2015 USD ($)	Feb. 18, 2015 USD ($)
Acquisitions
Long-term debt			$ 11,035.0					$ 11,035.0							$ 11,035.0					$ 5,028.0
Purchase price, net of cash acquired															(413.0)	$ 29.0
Cross-currency swap
Acquisitions
Notional amount terminated			1,000.0
Ball Corporation
Acquisitions
Purchase price, net of cash acquired															(4,506.0)
Rexam \| Interest rate swap agreements \| Derivatives Not Designated As Hedging Instruments
Acquisitions
Notional amount terminated								200.0
Rexam \| Interest rate swaption \| Derivatives Not Designated As Hedging Instruments
Acquisitions
Notional amount terminated \| €						€ 1,600
Rexam
Acquisitions
Purchase price, net of cash acquired		£ 2.9	3,800.0
Repayments of Assumed Debt	$ 2,700.0
Rexam \| Currency exchange option and collar \| Derivatives Not Designated As Hedging Instruments
Acquisitions
Notional amount terminated							£ 1.4	1,800.0
Rexam \| Interest rate swap agreements \| Derivatives Not Designated As Hedging Instruments
Acquisitions
Notional amount terminated													€ 850	$ 923.0
Rexam \| Cross-currency swap
Acquisitions
Notional amount terminated			705.0
Latapack-Ball Embalagens Ltda. (Latapack-Ball)
Acquisitions
Treasury stock exchanged (in shares) \| shares												5.7
Consideration transferred												$ 17.4
Wavefront
Acquisitions
Purchase price, net of cash acquired										$ 36.0
Sonoco
Acquisitions
Business acquired in cash											$ 29.0
Contingent cash consideration																							$ 11.0
Contingent noncash consideration																							$ 24.0
Term C Loan
Acquisitions
Repayment of debt obligation				$ 93.0
Bridge Facility
Acquisitions
Maximum borrowing capacity of revolving credit facility \| £																								£ 3.3
Face amount of debt \| £																			£ 1.9			£ 3.3
Senior Notes 4.375 Percent Due 2020
Acquisitions
Long-term debt																				$ 1,000.0
Interest rate (as a percent)																		4.375%	4.375%	4.375%
Senior Notes 4.375 Percent Due 2020 \| Senior Notes [Member]
Acquisitions
Long-term debt																				$ 1,000.0
Senior Notes 3.5 Percent Due 2020
Acquisitions
Long-term debt \| €																		€ 400
Interest rate (as a percent)																		3.50%	3.50%	3.50%
Senior Notes 4.375 Percent Due 2023
Acquisitions
Long-term debt \| €																		€ 700
Interest rate (as a percent)																		4.375%	4.375%	4.375%
Revolving Credit Facility
Acquisitions
Maximum borrowing capacity of revolving credit facility																2,250.0					$ 3,000.0				$ 3,000.0
Face amount of debt																										$ 1,000.0
5.25% Senior Notes, due June 2025
Acquisitions
Long-term debt																$ 1,000.0
Interest rate (as a percent)																5.25%
Multi-currency usd revolver, due March 2021 at variable rate
Acquisitions
Long-term debt			205.0					205.0							205.0
Maturity term									5 years
New revolving credit facility made to repay loan amount									$ 1,500.0
Term C Loan, euro denominated
Acquisitions
Repayment of debt obligation											$ 93.0
Term A Loan, due March 2021
Acquisitions
Long-term debt			1,400.0					1,400.0							1,400.0
Face amount of debt																	$ 1,400.0
Maturity term									5 years
Term A Loan, due March 2021 \| Rexam
Acquisitions
Proceeds released from restricted cash escrow accounts					$ 3,800.0
Term A Loan, Euro denominated, due March 2021
Acquisitions
Long-term debt			$ 1,222.0					$ 1,222.0							$ 1,222.0
Face amount of debt \| €													€ 1,100
Maturity term									5 years