Pensions and Other Postretirement Benefits (Additional Information) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
	Aug. 04, 2016	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Expected future employer contributions, excluding settlment losses		$ 50		$ 50
Cash payment to retirees - U.S. Non-qualified Pension Plan				40
Pension settlement charges, pre tax		0	$ 968	22	$ 968
Noncash Pension Settlement Charge - after tax				14
U.S. Defined Benefit Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Contributions to defined benefit pension plans		0	50	29	50
Non-U.S Defined Benefit Pension Plan [Member] | Minimum [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Expected employer mandatory contributions				10
Non-U.S Defined Benefit Pension Plan [Member] | Maximum [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Expected employer mandatory contributions				15
Non-U.S Defined Benefit Pension Plan [Member] | Mandatory Contribution [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Contributions to defined benefit pension plans		6	15	14	28
Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Expected future employer contributions, excluding settlment losses		65		65
Pension settlement charges, pre tax		0	$ 968	22	$ 968
Other Postretirement Benefit Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Expected future employer contributions, excluding settlment losses		$ 15		$ 15
U.S. Postretirement Medical [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Increase (decrease) in benefit obligation due to U.S. Plan Merger and Remeasurement	$ (306)
Increase (decrease) in amortization	$ (54)
Amortization reduction period	5 years