Financial Statements for Guarantors of the Senior Notes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Condensed Income Statements, Captions [Line Items]
Revenue	$ 1,562.8	$ 1,110.3	$ 4,508.6	$ 3,109.3
Cost of revenues	1,172.2	836.3	3,344.5	2,359.6
Selling, engineering, and administrative expenses	113.0	70.6	293.0	211.1
Gains on disposition of property, plant, and equipment	3.6	2.2	103.4	9.9
Cost of revenues and operating costs	1,281.6	904.7	3,534.1	2,560.8
Operating profit (loss)	281.2	205.6	974.5	548.5
Other (income) expense	46.8	44.7	137.1	137.8
Equity in earnings of subsidiaries, net of taxes	0	0	0	0
Income (loss) from continuing operations before income taxes	234.4	160.9	837.4	410.7
Provision (benefit) for income taxes	78.1	55.1	274.5	143.5
Income (loss) from continuing operations	156.3	105.8	562.9	267.2
Income (loss) from discontinued operations, net of provision (benefit) for income taxes	0.6	0.3	0.1	5.9
Net income (loss)	156.9	106.1	563.0	273.1
Net income attributable to noncontrolling interest	7.5	6.5	23.0	10.4
Net income (loss) attributable to controlling interest	149.4	99.6	540.0	262.7
Other comprehensive income (loss)	4.4	4.8	11.5	16.4
Comprehensive income	161.3	110.9	574.5	289.5
Parent
Condensed Income Statements, Captions [Line Items]
Revenue	0	0	0	0
Cost of revenues	0	0	0	0
Selling, engineering, and administrative expenses	37.4	17.2	87.5	49.9
Gains on disposition of property, plant, and equipment	0.1	0.4	(0.1)	0.2
Cost of revenues and operating costs	37.3	16.8	87.6	49.7
Operating profit (loss)	(37.3)	(16.8)	(87.6)	(49.7)
Other (income) expense	5.4	2.7	13.7	2.5
Equity in earnings of subsidiaries, net of taxes	212.6	126.6	622.4	295.8
Income (loss) from continuing operations before income taxes	169.9	107.1	521.1	243.6
Provision (benefit) for income taxes	13.0	1.0	(41.9)	(29.5)
Income (loss) from continuing operations	156.9	106.1	563.0	273.1
Income (loss) from discontinued operations, net of provision (benefit) for income taxes	0	0	0	0
Net income (loss)	156.9	106.1	563.0	273.1
Net income attributable to noncontrolling interest	7.5	6.5	23.0	10.4
Net income (loss) attributable to controlling interest	149.4	99.6	540.0	262.7
Other comprehensive income (loss)	1.2	3.6	2.4	3.6
Comprehensive income	158.1	109.7	565.4	276.7
Combined Guarantor Subsidiaries
Condensed Income Statements, Captions [Line Items]
Revenue	1,170.8	811.5	3,451.0	2,278.1
Cost of revenues	922.9	653.2	2,671.7	1,835.5
Selling, engineering, and administrative expenses	39.7	31.3	109.7	97.3
Gains on disposition of property, plant, and equipment	1.1	0.5	48.3	7.5
Cost of revenues and operating costs	961.5	684.0	2,733.1	1,925.3
Operating profit (loss)	209.3	127.5	717.9	352.8
Other (income) expense	3.4	5.8	12.4	19.0
Equity in earnings of subsidiaries, net of taxes	39.5	50.9	165.9	103.4
Income (loss) from continuing operations before income taxes	245.4	172.6	871.4	437.2
Provision (benefit) for income taxes	46.8	19.1	277.8	128.9
Income (loss) from continuing operations	198.6	153.5	593.6	308.3
Income (loss) from discontinued operations, net of provision (benefit) for income taxes	0.9	0.1	0.2	11.8
Net income (loss)	199.5	153.6	593.8	320.1
Net income attributable to noncontrolling interest	7.5	6.5	23.0	10.4
Net income (loss) attributable to controlling interest	192.0	147.1	570.8	309.7
Other comprehensive income (loss)	0	0	0	0
Comprehensive income	199.5	153.6	593.8	320.1
Combined Non-Guarantor Subsidiaries
Condensed Income Statements, Captions [Line Items]
Revenue	604.1	454.2	1,650.9	1,280.5
Cost of revenues	461.6	343.2	1,265.4	976.3
Selling, engineering, and administrative expenses	35.9	22.1	95.8	64.6
Gains on disposition of property, plant, and equipment	2.4	1.3	55.2	2.2
Cost of revenues and operating costs	495.1	364.0	1,306.0	1,038.7
Operating profit (loss)	109.0	90.2	344.9	241.8
Other (income) expense	38.0	36.2	111.0	116.3
Equity in earnings of subsidiaries, net of taxes	0	0	0	0
Income (loss) from continuing operations before income taxes	71.0	54.0	233.9	125.5
Provision (benefit) for income taxes	18.3	33.3	38.9	42.8
Income (loss) from continuing operations	52.7	20.7	195.0	82.7
Income (loss) from discontinued operations, net of provision (benefit) for income taxes	(0.3)	0.2	(0.1)	(5.9)
Net income (loss)	52.4	20.9	194.9	76.8
Net income attributable to noncontrolling interest	0	0	0	0
Net income (loss) attributable to controlling interest	52.4	20.9	194.9	76.8
Other comprehensive income (loss)	3.2	1.2	9.1	12.8
Comprehensive income	55.6	22.1	204.0	89.6
Eliminations
Condensed Income Statements, Captions [Line Items]
Revenue	(212.1)	(155.4)	(593.3)	(449.3)
Cost of revenues	(212.3)	(160.1)	(592.6)	(452.2)
Selling, engineering, and administrative expenses	0	0	0	(0.7)
Gains on disposition of property, plant, and equipment	0	0	0	0
Cost of revenues and operating costs	(212.3)	(160.1)	(592.6)	(452.9)
Operating profit (loss)	0.2	4.7	(0.7)	3.6
Other (income) expense	0	0	0	0
Equity in earnings of subsidiaries, net of taxes	(252.1)	(177.5)	(788.3)	(399.2)
Income (loss) from continuing operations before income taxes	(251.9)	(172.8)	(789.0)	(395.6)
Provision (benefit) for income taxes	0	1.7	(0.3)	1.3
Income (loss) from continuing operations	(251.9)	(174.5)	(788.7)	(396.9)
Income (loss) from discontinued operations, net of provision (benefit) for income taxes	0	0	0	0
Net income (loss)	(251.9)	(174.5)	(788.7)	(396.9)
Net income attributable to noncontrolling interest	(7.5)	(6.5)	(23.0)	(10.4)
Net income (loss) attributable to controlling interest	(244.4)	(168.0)	(765.7)	(386.5)
Other comprehensive income (loss)	0	0	0	0
Comprehensive income	$ (251.9)	$ (174.5)	$ (788.7)	$ (396.9)