Reporting Segments and Related Information (Details) - USD ($) $ in Millions		3 Months Ended								12 Months Ended
		Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Customer sales										$ 9,071.0	$ 8,023.2	$ 8,305.1
Net sales		$ 2,259.0	$ 2,214.2	$ 2,329.2	$ 2,268.6	$ 2,123.1	$ 1,884.0	$ 2,031.9	$ 1,984.2	9,071.0	8,023.2	8,305.1
Year-end assets		8,834.7				8,825.7				8,834.7	8,825.7	7,225.2
Depreciation and amortization										391.4	320.2	330.4
Long-lived asset expenditures	[1]									500.6	577.3	563.0
Operating Segments [Member]
Segment Reporting Information [Line Items]
Customer sales										9,071.0	8,023.2	8,305.1
Net sales										9,071.0	8,023.2	8,305.1
Year-end assets		7,347.0				7,702.9				7,347.0	7,702.9	5,719.7
Depreciation and amortization										366.4	297.2	308.1
Long-lived asset expenditures	[1]									481.5	554.2	539.0
Engine [Member]
Segment Reporting Information [Line Items]
Customer sales										5,547.3	5,466.5	5,673.7
Inter-segment sales										42.8	33.5	32.2
Net sales										5,590.1	5,500.0	5,705.9
Year-end assets		4,134.6				4,017.8				4,134.6	4,017.8	3,936.2
Depreciation and amortization										211.9	200.2	215.3
Long-lived asset expenditures	[1]									298.7	332.4	349.8
Drivetrain [Member]
Segment Reporting Information [Line Items]
Customer sales										3,523.7	2,556.7	2,631.4
Inter-segment sales
Net sales										3,523.7	2,556.7	2,631.4
Year-end assets		3,212.4				3,685.1				3,212.4	3,685.1	1,783.5
Depreciation and amortization										154.5	97.0	92.8
Long-lived asset expenditures	[1]									182.8	221.8	189.2
Inter-segment eliminations [Member]
Segment Reporting Information [Line Items]
Inter-segment sales										(42.8)	(33.5)	(32.2)
Net sales										(42.8)	(33.5)	(32.2)
Corporate Segment [Member]
Segment Reporting Information [Line Items]
Year-end assets	[2]	$ 1,487.7				$ 1,122.8				1,487.7	1,122.8	1,505.5
Depreciation and amortization	[2]									25.0	23.0	22.3
Long-lived asset expenditures	[1],[2]									$ 19.1	$ 23.1	$ 24.0

[1] Long-lived asset expenditures include capital expenditures and tooling outlays.

[2] Corporate assets include investments and other long-term receivables and deferred income taxes.