Retirement Plans (Tables)

12 Months Ended

Dec. 31, 2016

	Pension Benefits						Postretirement Benefits
	2016			2015			2016			2015
	(Millions)
Change in benefit obligation:
Benefit obligation at beginning of year	$	1,308		$	1,377		$	23		$	24
Service cost		15			33			—			1
Interest cost		42			52			1			1
Actuarial loss (gain)		63			(68	)		(1	)		(2	)
Plan amendments		2			—			—			1
Plan curtailments		(31	)		—			—			—
Plan settlements		(94	)		—			—			—
Foreign exchange rate changes		1			(6	)		—			—
Participant contributions		—			—			—			2
Benefits paid		(57	)		(80	)		(2	)		(4	)
Benefit obligation at end of year		1,249			1,308			21			23
Change in plan assets:
Fair value of plan assets at beginning of year		1,059			1,149			—			—
Actual return on plan assets		61			(16	)		—			—
Employer contributions		16			11			2			2
Participant contributions		—			—			—			2
Plan settlements		(94	)		—			—			—
Benefits paid		(57	)		(80	)		(2	)		(4	)
Foreign exchange rate changes		—			(5	)		—			—
Fair value of plan assets at end of year		985			1,059			—			—
Funded status at end of year	$	(264	)	$	(249	)	$	(21	)	$	(23	)
Amounts recognized in balance sheet:
Other long-term assets	$	3		$	2		$	—		$	—
Other current liabilities		(13	)		(12	)		(3	)		(3	)
Other long-term liabilities		(254	)		(239	)		(18	)		(20	)
Net amount	$	(264	)	$	(249	)	$	(21	)	$	(23	)
Amounts recognized in accumulated other comprehensive earnings:
Net actuarial loss (gain)	$	285		$	302		$	(11	)	$	(11	)
Prior service cost (credit)		8			14			(5	)		(6	)
Total	$	293		$	316		$	(16	)	$	(17	)

	Pension Benefits									Postretirement Benefits
	2016			2015			2014			2016			2015			2014
	(Millions)
Net periodic benefit cost:
Service cost	$	15		$	33		$	30		$	—		$	1		$	1
Interest cost		42			52			55			1			1			1
Expected return on plan assets		(55	)		(58	)		(54	)		—			—			—
Curtailment and settlement expense		—			—			1			—			—			—
Recognition of net actuarial loss (gain) ⁽¹⁾		25			20			18			(1	)		(1	)		(1	)
Recognition of prior service cost ⁽¹⁾		3			4			4			(1	)		(2	)		(2	)
Total net periodic benefit cost ⁽²⁾		30			51			54			(1	)		(1	)		(1	)
Other comprehensive loss (earnings):
Actuarial loss (gain) arising in current year		26			5			57			—			(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⁾		(43	)		(20	)		(19	)		1			1			1
Recognition of prior service cost, including curtailment, in net periodic benefit cost ⁽³⁾		(9	)		(4	)		(4	)		1			1			2
Total other comprehensive loss (earnings)		(24	)		(19	)		34			2			2			3
Total recognized	$	6		$	32		$	88		$	1		$	1		$	2

(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 the current period. See Note 6 for further discussion.

	Pension Benefits						Postretirement Benefits
	2016		2015		2014		2016		2015		2014
Assumptions to determine benefit obligations:
Discount rate		4.07%		4.25%		3.90%		3.46%		3.63%		3.25%
Rate of compensation increase		4.49%		4.49%		4.49%	N/A		N/A		N/A
Assumptions to determine net periodic benefit cost:
Discount rate		4.39%		3.90%		4.80%		3.63%		3.25%		3.65%
Rate of compensation increase		4.49%		4.49%		4.49%	N/A		N/A		N/A
Expected return on plan assets		5.20%		5.22%		5.42%	N/A		N/A		N/A

	As of December 31, 2016
						Fair Value Measurements Using:
	Actual Allocation			Total		Level 1 Inputs		Level 2 Inputs		Level 3 Inputs
	(Millions)
Fixed-income securities:
U.S. Treasury obligations		35	%	$	343	$	68	$	275	$	—
Corporate bonds		30	%		297		205		92		—
Other bonds		4	%		38		38		—		—
Total fixed-income securities		69	%		678		311		367		—
Equity securities:
Global (large, mid, small cap)		17	%		171		—		171		—
Other securities:
Hedge fund and alternative investments		11	%		112		—		—		112
Short-term investments		3	%		24		8		16		—
Total other securities		14	%		136		8		16		112
Total investments		100	%	$	985	$	319	$	554	$	112

	As of December 31, 2015
						Fair Value Measurements Using:
	Actual Allocation			Total		Level 1 Inputs		Level 2 Inputs		Level 3 Inputs
	(Millions)
Fixed-income securities:
U.S. Treasury obligations		17	%	$	179	$	88	$	91	$	—
Corporate bonds		48	%		507		371		136		—
Other bonds		3	%		35		35		—		—
Total fixed-income securities		68	%		721		494		227		—
Equity securities:
Global (large, mid, small cap)		18	%		186		—		186		—
Other securities:
Hedge fund and alternative investments		11	%		120		—		—		120
Short-term investments		3	%		32		6		26		—
Total other securities		14	%		152		6		26		120
Total investments		100	%	$	1,059	$	500	$	439	$	120

	Year Ended December 31,
	2016		2015		2014
	(Millions)
401(k) and enhanced contribution plans	$	53	$	63	$	49
Canadian pension and savings plans		11		16		20
Total	$	64	$	79	$	69