Pension Plans, Postretirement and Other Employee Benefits - Additional Information (Details) $ in Millions	3 Months Ended
	Mar. 31, 2017 USD ($)
US Pension
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Employer contributions	$ 11
Foreign Pension
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Employer contributions	3
Pension Plan
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Employer estimated contributions	18
Other Pension Plan
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Employer contributions	10
Non-cash contribution expense	6
US Postretirement
Pension Plans, Postretirement and Other Employee Benefits [Line Items]
Employer contributions	2
Employer estimated contributions	$ 8