Shareholders' Equity (Details 3) - USD ($) shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Nov. 30, 2015
Amounts Reclassified from AOCI
Net sales	$ 1,804.6	$ 2,097.0	$ 2,172.3	$ 1,923.1	$ 2,032.4	$ 2,238.9	$ 2,291.9	$ 2,006.8	$ 7,997.0	$ 8,570.0	$ 8,468.1
Cost of sales									(7,391.8)	(7,731.4)	(7,672.7)
Selling, general and administrative expense									451.3	466.5	418.6
Interest rate contracts recorded in interest expense									(259.7)	(193.0)	(211.8)
Earnings before taxes	62.6	$ 17.6	$ 237.8	$ 27.5	$ 98.3	$ 187.9	$ 215.3	$ 144.1	345.5	645.6	583.6
Tax benefit (provision) on amounts reclassified into earnings									(47.0)	(149.9)	(149.6)
Net earnings									302.9	498.0	435.0
Noncontrolling Interest
Noncontrolling interest for consideration of common stock									(17.4)
Joint Venture At Brazil
Noncontrolling Interest
Treasury stock exchanged (in shares)												5.7
Noncontrolling interest for consideration of common stock	403.0
Cash consideration for remaining interest	17.4
Noncontrolling interest carrying value and fair value paid	220.2								220.2
Time of acquisition	200.2								200.2
Total consideration	$ 420.4
Ball Corporation
Amounts Reclassified from AOCI
Cost of sales									414.2	630.0	571.5
Selling, general and administrative expense									80.2	77.4	81.4
Interest rate contracts recorded in interest expense									(253.8)	(183.1)	(199.9)
Earnings before taxes									160.4	446.9	371.6
Tax benefit (provision) on amounts reclassified into earnings									120.5	23.1	35.2
Net earnings									280.9	470.0	406.8
Effective Derivatives (Net of Tax). | Amount Reclassified from Accumulated Other Comprehensive Earnings (Loss)
Amounts Reclassified from AOCI
Earnings before taxes									(16.7)	(33.4)	(28.5)
Tax benefit (provision) on amounts reclassified into earnings									6.2	2.7	7.1
Net earnings									(10.5)	(30.7)	(21.4)
Effective Derivatives (Net of Tax). | Amount Reclassified from Accumulated Other Comprehensive Earnings (Loss) | Commodity contracts
Amounts Reclassified from AOCI
Net sales									5.4	(6.2)	8.4
Effective Derivatives (Net of Tax). | Amount Reclassified from Accumulated Other Comprehensive Earnings (Loss) | Commodity contract and currency exchange contracts
Amounts Reclassified from AOCI
Cost of sales									(23.6)	(27.2)	(35.9)
Effective Derivatives (Net of Tax). | Amount Reclassified from Accumulated Other Comprehensive Earnings (Loss) | Foreign currency contracts
Amounts Reclassified from AOCI
Selling, general and administrative expense									1.7
Effective Derivatives (Net of Tax). | Amount Reclassified from Accumulated Other Comprehensive Earnings (Loss) | Interest rate swap agreements
Amounts Reclassified from AOCI
Interest rate contracts recorded in interest expense									(0.2)		(1.0)
Pension and Other Postretirement Benefits. | Amount Reclassified from Accumulated Other Comprehensive Earnings (Loss)
Amounts Reclassified from AOCI
Earnings before taxes									(46.7)
Total before tax effect										(81.5)	(48.8)
Tax benefit (expense) on amounts reclassified into earnings									(17.1)	(30.2)	(18.2)
Recognized gain (loss)									(29.6)	(51.3)	(30.6)
Prior service income | Amount Reclassified from Accumulated Other Comprehensive Earnings (Loss)
Amounts Reclassified from AOCI
Prior service income (cost)									1.0	0.6	1.0
Actuarial gains (losses) | Amount Reclassified from Accumulated Other Comprehensive Earnings (Loss)
Amounts Reclassified from AOCI
Actuarial gains (losses)									$ (47.7)	(36.8)	$ (49.8)
Effect of pension settlement | Amount Reclassified from Accumulated Other Comprehensive Earnings (Loss)
Amounts Reclassified from AOCI
Effect of pension settlement										$ (45.3)