Retirement Plans (Tables)

12 Months Ended

Dec. 31, 2017

Compensation And Retirement Disclosure [Abstract]

Schedule Of Changes In Defined Benefit Plan Obligations

	Pension Benefits						Postretirement Benefits
	2017			2016			2017			2016
Change in benefit obligation:
Benefit obligation at beginning of year	$	1,249		$	1,308		$	21		$	23
Service cost		15			15			—			—
Interest cost		42			42			—			1
Actuarial loss (gain)		59			63			—			(1	)
Plan amendments		—			2			—			—
Plan curtailments		—			(31	)		—			—
Plan settlements		—			(94	)		—			—
Foreign exchange rate changes		2			1			—			—
Participant contributions		—			—			1			—
Benefits paid		(88	)		(57	)		(3	)		(2	)
Benefit obligation at end of year		1,279			1,249			19			21
Change in plan assets:
Fair value of plan assets at beginning of year		985			1,059			—			—
Actual return on plan assets		122			61			—			—
Employer contributions		14			16			2			2
Participant contributions		—			—			1			—
Plan settlements		—			(94	)		—			—
Benefits paid		(88	)		(57	)		(3	)		(2	)
Foreign exchange rate changes		2			—			—			—
Fair value of plan assets at end of year		1,035			985			—			—
Funded status at end of year	$	(244	)	$	(264	)	$	(19	)	$	(21	)
Amounts recognized in balance sheet:
Other long-term assets	$	4		$	3		$	—		$	—
Other current liabilities		(13	)		(13	)		(3	)		(3	)
Other long-term liabilities		(235	)		(254	)		(16	)		(18	)
Net amount	$	(244	)	$	(264	)	$	(19	)	$	(21	)
Amounts recognized in accumulated other    comprehensive earnings:
Net actuarial loss (gain)	$	257		$	285		$	(11	)	$	(11	)
Prior service cost (credit)		6			8			(3	)		(5	)
Total	$	263		$	293		$	(14	)	$	(16	)

Schedule Of Net Periodic Benefit Cost And Other Comprehensive Loss (Earnings) For Pension And Postretirement Benefit Plans

	Pension Benefits									Postretirement Benefits
	2017			2016			2015			2017			2016			2015
Net periodic benefit cost:
Service cost	$	15		$	15		$	33		$	—		$	—		$	1
Interest cost		42			42			52			—			1			1
Expected return on plan assets		(54	)		(55	)		(58	)		—			—			—
Recognition of net actuarial loss (gain) (1)		19			25			20			(1	)		(1	)		(1	)
Recognition of prior service cost (1)		2			3			4			(1	)		(1	)		(2	)
Total net periodic benefit cost (2)		24			30			51			(2	)		(1	)		(1	)
Other comprehensive loss (earnings):
Actuarial loss (gain) arising in current year		(9	)		26			5			(1	)		—			(1	)
Prior service cost (credit) arising in current year		—			2			—			—			—			1
Recognition of net actuarial loss, including settlement    expense, in net periodic benefit cost (3)		(19	)		(43	)		(20	)		1			1			1
Recognition of prior service cost, including    curtailment, in net periodic benefit cost (3)		(2	)		(9	)		(4	)		1			1			1
Total other comprehensive loss (earnings)		(30	)		(24	)		(19	)		1			2			2
Total recognized	$	(6	)	$	6		$	32		$	(1	)	$	1		$	1

(1) These net periodic benefit costs were reclassified out of other comprehensive earnings in the current period.

(2) Net periodic benefit cost is a component of G&A on the accompanying consolidated comprehensive statements of earnings.

(3) These amounts include restructuring costs that were reclassified out of other comprehensive earnings in 2016. See Note 7 for further discussion.

Schedule Of Weighted Average Actuarial Assumptions Used To Determine Benefit Obligations And Net Periodic Benefit Costs

	Pension Benefits					Postretirement Benefits
	2017	2016		2015		2017	2016		2015
Assumptions to determine benefit obligations:
Discount rate	3.59%		4.07%		4.25%	3.25%		3.46%		3.63%
Rate of compensation increase	2.50%		4.49%		4.49%	N/A	N/A		N/A
Assumptions to determine net periodic benefit cost:
Discount rate	4.08%		4.39%		3.90%	3.46%		3.63%	3.25%
Rate of compensation increase	4.48%		4.49%		4.49%	N/A	N/A		N/A
Expected return on plan assets	5.69%		5.20%		5.22%	N/A	N/A		N/A