Revenue (Tables)

3 Months Ended

Mar. 31, 2018

Revenue From Contract With Customer [Abstract]

Revenue Disaggregated by Primary Region and Products

In the following tables, revenue is disaggregated by primary region and products.

Net Sales by Region
(Dollars in millions)	Three months ended March 31, 2018
	Passive Safety Segment		Electronics Segment		Total
Asia	$	793.0	$	211.1	$	1,004.1
Whereof: China		366.7		101.1		467.8
Japan		214.8		69.6		284.4
Rest of Asia		211.5		40.4		251.9
Americas		668.1		192.7		860.8
Europe		779.6		168.3		947.9
Total	$	2,240.7	$	572.1	$	2,812.8

Net Sales by Region
(Dollars in millions)	Three months ended March 31, 2017
	Passive Safety Segment		Electronics Segment		Total
Asia	$	708.8	$	207.2	$	916.0
Whereof: China		322.9		100.5		423.4
Japan		200.0		61.6		261.6
Rest of Asia		185.9		45.1		231.0
Americas		648.1		215.5		863.6
Europe		684.5		144.0		828.5
Total	$	2,041.4	$	566.7	$	2,608.1

Net Sales by Products
(Dollars in millions)	Three months ended March 31, 2018
	Passive Safety Segment2)		Electronics Segment2)		Total
Airbag Products1)	$	1,443.1	n/a		$	1,443.1
Seatbelt Products1)		797.6	n/a			797.6
Restraint Control Systems	n/a		$	245.5		245.5
Active Safety1)	n/a			213.0		213.0
Brake Systems	n/a			113.6		113.6
Total net sales	$	2,240.7	$	572.1	$	2,812.8
1) Including corporate and other sales.
2) Excluding intersegment sales.

Net Sales by Products
(Dollars in millions)	Three months ended March 31, 2017
	Passive Safety Segment2)		Electronics Segment2)		Total
Airbag Products1)	$	1,354.3	n/a		$	1,354.3
Seatbelt Products1)		687.1	n/a			687.1
Restraint Control Systems	n/a		$	254.7		254.7
Active Safety1)	n/a			191.5		191.5
Brake Systems	n/a			120.5		120.5
Total net sales	$	2,041.4	$	566.7	$	2,608.1
1) Including corporate and other sales.
2) Excluding intersegment sales.

Summary of Information about Receivables, Contract Assets, and Contract Liabilities from Contracts with Customers

The following tables provides information about receivables, contract assets, and contract liabilities from contracts with customers.

Contract Balances with Customers
(Dollars in millions)	As of
	March 31, 2018		December 31, 2017
Receivables, net	$	2,406.0	$	2,157.2
Contract assets 1)		25.7		—
Contract liabilities 2)		33.6		33.0
1) Included in other current assets.
2) Included in other current and other non-current liabilities.

Receivables, net of allowance
(Dollars in millions)	As of
	March 31, 2018			December 31, 2017
Receivables	$	2,413.6		$	2,165.7
Allowance at beginning of period		(8.5	)		(7.8	)
Net decrease/(increase) of allowance		1.0			0.0
Translation difference		(0.1	)		(0.7	)
Allowance at end of period		(7.6	)		(8.5	)
Receivables, net of allowance	$	2,406.0		$	2,157.2

Summary of Changes in Contract Assets and Contract Liabilities

Changes in the contract assets and the contract liabilities balances during the period are as follows:

Change in Contract Balances with Customers
(Dollars in millions)
	Three months ended March 31, 2018
	Contract assets			Contract liabilities
Beginning balance	$	—		$	33.0
Increases/(decreases) due to cumulative catch up adjustment		22.0			—
Increases/(decreases) due to revenue recognized		25.7			(0.4	)
Increases/(decreases) due to cash received		—			—
Increases/(decreases) due to transfer to receivables		(22.0	)		—
Translation difference		0.0			1.0
Ending balance	$	25.7		$	33.6