Benefit Obligations (Schedule of Company's Pension and Post Retirement Benefit Plans) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Amounts Recognized in Accumulated Other Comprehensive Income Consist of:
Net amount recognized		$ 7	$ 0	$ (9)
Other comprehensive (income) loss, tax effect		4	5
Pension Plan [Member]
Change in Projected Benefit Obligation
Projected benefit obligation as of beginning of period		3,412	3,728
Service cost		9	9	9
Interest cost		115	104	107
Net actuarial (gain) loss	[1]	377	(163)
Settlements		(3)	0
Benefits paid		(230)	(235)
Curtailments		0	(1)
Special termination benefits		1	2
Exchange rate changes		(3)	(32)
Other	[2]	(68)	0
Projected benefit obligation as of end of period		3,610	3,412	3,728
Change in Plan Assets
Fair value of plan assets as of beginning of period		2,915	3,251
Actual return on plan assets		467	(124)
Employer contributions		42	43
Settlements		(3)	0
Benefits paid	[3]	(230)	(235)
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Other Change	[2]	(52)	0
Exchange rate changes		2	(20)
Fair value of plan assets as of end of period		3,141	2,915	3,251
Funded status as of end of period		(469)	(497)
Amounts Recognized in the Consolidated Balance Sheets Consist of:
Noncurrent Other assets		77	30
Current Other liabilities		(23)	(24)
Benefit obligations		(523)	(503)
Funded status as of end of period		(469)	(497)
Amounts Recognized in Accumulated Other Comprehensive Income Consist of:
Net actuarial (gain) loss	[4]	15	8
Prior service (benefit) cost		0	0
Net amount recognized	[5]	15	8
Other Postretirement Benefits Plan [Member]
Change in Projected Benefit Obligation
Projected benefit obligation as of beginning of period		59	66
Service cost		0	1	1
Interest cost		2	2	1
Net actuarial (gain) loss	[1]	8	(4)
Settlements		0	0
Benefits paid		(5)	(4)
Curtailments		0	0
Special termination benefits		0	0
Exchange rate changes		0	(2)
Other	[2]	0	0
Projected benefit obligation as of end of period		64	59	66
Change in Plan Assets
Fair value of plan assets as of beginning of period		0	0
Actual return on plan assets		0	0
Employer contributions		5	4
Settlements		0	0
Benefits paid	[3]	(5)	(4)
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Other Change	[2]	0	0
Exchange rate changes		0	0
Fair value of plan assets as of end of period		0	0	$ 0
Funded status as of end of period		(64)	(59)
Amounts Recognized in the Consolidated Balance Sheets Consist of:
Noncurrent Other assets		0	0
Current Other liabilities		(4)	(5)
Benefit obligations		(60)	(54)
Funded status as of end of period		(64)	(59)
Amounts Recognized in Accumulated Other Comprehensive Income Consist of:
Net actuarial (gain) loss	[4]	0	0
Prior service (benefit) cost		(1)	0
Net amount recognized	[5]	(1)	0
Supplemental Employee Retirement Plan [Member]
Change in Plan Assets
Benefits paid		$ (21)	$ (22)

[1] Primarily relates to changes in discount rates.

[2] Primarily relates to lump sum offers for certain participants of the US qualified defined benefit pension plan

[3] Includes benefit payments to nonqualified pension plans of $21 million and $22 million as of December 31, 2019 and 2018, respectively.

[4] Relates to the pension plans of the Company's equity method investments.

[5] Amount shown net of an income tax benefit of $4 million and $5 million as of December 31, 2019 and 2018, respectively, in the consolidated statements of equity (Note 17).