Retirement Benefits (Tables)

9 Months Ended

Sep. 30, 2018

Compensation And Retirement Disclosure [Abstract]

Schedule of Net Periodic Benefit Cost

The following tables set forth the components of net periodic benefit (income)/cost for the Company’s defined benefit pension and PRW plans for the three and nine months ended September 30, 2018 and 2017:

	Three Months Ended September 30,
	2018											2017
	U.S.			U.K.			Other			PRW		U.S.			U.K.			Other			PRW
Service cost	$	17		$	4		$	6		$	—	$	16		$	8		$	6		$	—
Interest cost		35			24			4			1		34			23			4			1
Expected return on plan assets		(68	)		(72	)		(8	)		—		(61	)		(72	)		(7	)		—
Settlement		—			12			(14	)		—		1			—			—			—
Amortization of net loss		3			10			—			1		4			13			—			—
Amortization of prior service credit		—			(4	)		—			—		—			(4	)		—			—
Net periodic benefit (income)/cost	$	(13	)	$	(26	)	$	(12	)	$	2	$	(6	)	$	(32	)	$	3		$	1

	Nine Months Ended September 30,
	2018											2017
	U.S.			U.K.			Other			PRW		U.S.			U.K.			Other			PRW
Service cost	$	50		$	14		$	16		$	—	$	49		$	23		$	15		$	—
Interest cost		105			72			13			3		104			69			13			3
Expected return on plan assets		(205	)		(227	)		(23	)		—		(184	)		(211	)		(22	)		—
Settlement		—			32			(14	)		—		1			—			—			—
Amortization of net loss		9			34			1			1		10			39			1			—
Amortization of prior service credit		—			(14	)		—			—		—			(13	)		—			—
Net periodic benefit (income)/cost	$	(41	)	$	(89	)	$	(7	)	$	4	$	(20	)	$	(93	)	$	7		$	3