Postretirement Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2018

Retirement Benefits [Abstract]

Components of net periodic benefit cost and other amounts recognized in other comprehensive income

The components of net periodic benefit cost for our defined benefit pension plans are as follows:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
(in millions)	2018			2017			2018			2017
Domestic defined benefit pension plans:
Service cost	$	1		$	1		$	2		$	2
Interest cost	1			1			2			2
Expected return on plan assets	(1		)	(1		)	(3		)	(3		)
Amortization of net actuarial loss	—			—			1			1
Net periodic benefit cost	$	1		$	1		$	2		$	2
International defined benefit pension plans:
Service cost	$	3		$	3		$	5		$	6
Interest cost	5			5			10			10
Expected return on plan assets	(10		)	(8		)	(19		)	(16		)
Amortization of net actuarial loss	3			2			5			4
Settlement/Curtailment	—			—			1			—
Net periodic benefit cost	$	1		$	2		$	2		$	4
Total net periodic benefit cost	$	2		$	3		$	4		$	6